Stephen Robinson has promised St Mirren will have a go against Celtic on Saturday despite several heavy defeats against the Hoops this season.

The Buddies beat the cinch Premiership champions 2-0 at home in September but have lost 4-0 and 5-1 – the latter in the Scottish Cup – in Glasgow and 5-1 in Paisley, with the Saints reduced to 10 men in the last two meetings.

St Mirren, who secured a top-six spot for the first time in the current league format, were devastated to drop two points last week when Lawrence Shankland scored a stoppage-time penalty to complete Hearts’ comeback in a 2-2 draw and leave the Saints in sixth place, three points behind Hibernian and four behind the Jambos.

However, Robinson will stress positivity to his players against Celtic as they continue to battle for a European place.

“It was a huge blow for us last weekend but we felt sorry for ourselves for 48 hours, we came back in on Monday morning and it was back to work,” said the St Mirren boss, who revealed Alex Greive and Ryan Flynn are likely to miss the last three fixtures with injuries.

“You can’t change that, these things happen in football.

“I thought we deserved to win the game, we had enough chances. We were very good against a very good Hearts side, let’s make no mistake, and we made them look very average.

“There is a lot of positives but what stays in your mind is the last 20 seconds.

“But now we have to do it the hard way. We need to get points in the next two games and try to take it down to the last game against Rangers, that we still have a chance.

“We will go with a real positive attitude. We  went down to 10 men in two games against Celtic. It would be nice to finish with 11 and have a real go.

“It is another huge test but we go there to try and get a result.

“I am not going to sit back and get beat 1-0. If we go and have a right go at it and get beat 3-0 or 4-0 then so be it. We are going with positivity.”

Robinson, however, was dealt a double blow with the loss of striker Greive and midfielder Flynn.

The Northern Irishman said: “Alex Greive won’t be available – Curtis Main is our only fit senior striker – and neither will Ryan Flynn, both ankle ligament injuries.

“Both will be a struggle to play any more football this season.

“It is not major injuries but we are probably looking two to three weeks for both of them.

“It’s a blow because Tony (Watt) has already gone back to (parent club) Dundee United injured and Jonah (Ayunga) is injured so we are quite short up front. But we have two younger players, Lewis Jamieson and Kieran Offord, who will come into contention.”

Hearts have been successful in their appeal against Peter Haring’s sending-off in Saturday’s 2-2 draw with St Mirren.

The Scottish Football Association has downgraded the Austrian midfielder’s red card to a yellow following a tribunal hearing at Hampden on Wednesday.

Haring will now be available for Saturday’s cinch Premiership showdown with Aberdeen at Tynecastle.

The 29-year-old was sent off by referee David Dickinson after bringing down St Mirren midfielder Mark O’Hara midway through the second half of last weekend’s match. The Jambos lodged their appeal on Monday.

Hearts manager Steven Naismith said after the match: “I thought it was a foul to stop the game from a counter-attack. It was right in front of me, I didn’t think it was aggressive or even the speed I don’t think is excessive.”

Haring is the second Premiership player in the space of a month to have their red card retrospectively downgraded after Hibernian midfielder James Jeggo was also successful with an appeal following his recent dismissal against St Johnstone.

Hearts interim manager Steven Naismith felt referee David Dickinson got three major decisions wrong in his side’s 2-2 draw with St Mirren.

The 10-man Jambos earned an unlikely point when second-half goals from Josh Ginnelly and a Lawrence Shankland penalty deep into added time cancelled out first-half strikes from Joe Shaughnessy and Ryan Strain.

Naismith praised his players for battling back to salvage something from the match but felt their cause had not been helped by the match officials.

He disputed the red card shown to Peter Haring midway through the second half and the free-kick won by St Mirren that led to their second goal, while he also felt that Haring should have had a penalty early in the second period.

Naismith said: “For me it is three decisions (the referee got wrong). At the red card, VAR is involved in that as well, but I personally disagreed with it.

“I thought it was a foul to stop the game from a counter-attack. It was right in front of me, I didn’t think it was aggressive or even the speed I don’t think is excessive.

“The foul for the second (St Mirren) goal, I don’t agree with. I’m fortunate enough to have seen it again. Hilly (James Hill) just goes and wins the ball but yet we get given a foul against us and it cost us.

“I think we could also have had a penalty. This is our footage but I can see a clear pull on Peter Haring who is going into the area where the ball is going. I said last week I was frustrated (with the match officials) and I’m frustrated again this week because of a lack of consistency.

“The ref was really good at the end of the game, allowing me to speak to him and have a discussion and a conversation about it which is fine. I get his point of view and his team’s point of view but it doesn’t help us (in the chase) for three points.”

Meanwhile, Stephen Robinson felt that St Mirren’s progress this season could be measured by the fact they were disappointed at only drawing with Hearts.

The result severely dents the Paisley side’s chances of qualifying for Europe but Robinson felt a sense of perspective was needed.

He said: “It feels like a defeat but when we’re disappointed with a point against Hearts it tells you how far St Mirren have come. The circumstances with the game practically done make it hard to take but I’ll get round the boys and we’ll speak to them. There are lessons to be learned for everyone, but ultimately we should’ve seen the game out.”

Steven Naismith insists Hearts go into Saturday’s crunch game against St Mirren with increased confidence despite suffering defeat by Celtic last week.

The Hoops clinched the cinch Premiership title with a 2-0 win at Tynecastle, where goals from Kyogo Furuhashi and Oh Hyeon-gyu came after the home side lost Alex Cochrane to a contentious VAR-assisted red card on the stroke of half-time.

The Gorgie side had caused Celtic problems until it was adjudged that the Jambos defender had denied Parkhead attacker Daizen Maeda an obvious goalscoring opportunity.

Hearts interim boss Naismith had enjoyed a 6-1 win over Ross County in his first home match in charge but was far from disheartened by the Celtic setback.

“If anything else it gives us more confidence,” said Naismith, who revealed that appealing against Cochrane’s red card was discussed but it was decided “we don’t want to risk losing a player for longer”.

He added: “We have challenged the team at the top of the league who have been away out in front consistently with their performances and limited them to very little opportunities and more looking to the first half, we caused them loads of problems and not many teams have done that this season.

“I said after the game that there were lots of positives and that’s the way we looked at it coming away from the game.

“Not just looking at the game but the data that comes with it, it’s not perception, it’s fact.

“In the first half we were the dominant team, we created the better chances, where we played the game was in the better areas for us in general.

“We also analysed the goals and how they came and what we can do better but overall we are still definitely progressing as I would like and now we have to get results.”

With four fixtures remaining, Hearts are in fourth place in the table, five points behind Aberdeen, one ahead of Hibernian and two ahead of Stephen Robinson’s St Mirren, who have lost three in a row since beating the Jambos 2-0 at Tynecastle last month.

Naismith, whose side host the Dons the week after the St Mirren game, said: “The next couple of games coming up for us are going to be important.

“But we would rather be in this position, trying to go for European football than be in mid-table and not to be involved.

“St Mirren have consistently been in most games this season and they have done really well to get into the top six.

“I know as a club it is something they have been pushing for in the last few seasons and have narrowly missed out. This time they have made it which is an achievement in itself.

“The manager has come in and done a fantastic job and they have a way of playing we need to guard against.

“And as much as the results haven’t been there for them in the last couple of games, they definitely have a threat going forward.”

Tony Watt’s stint at St Mirren could be over after picking up an ankle injury in training.

The 29-year-old striker has made 11 appearances and scored once for the Buddies since joining on loan from cinch Premiership rivals Dundee United in January.

Ahead of the trip to Easter Road to play Hibernian on Saturday, St Mirren boss Stephen Robinson revealed Watt is to have a scan and admitted his concern about the Scotland cap for the five post-split fixtures.

The Northern Irishman said: “We had an injury to Tony Watt in training yesterday so he is not going to be available for Saturday.

“He went over on it. It was innocuous, just two players came together and he went over the wrong way but we are quite concerned about it at the moment

“He is having scans on his ankle today.

“Obviously we spoke to Dundee United, who own Tony, and we will have the results today and see where we go with it, but we are quite worried about it at the moment.”

Asked whether it was likely Watt could miss the rest of the campaign, Robinson said: “Potentially, yes. Obviously it’s hard to say without the scans but, on the initial look at it, the medical team weren’t too happy with it.

“It reduces our options in the forward areas, with Jonah (Ayunga) already injured, but we have people who have stepped in and done really well before. Alex Greive, young Lewis Jamieson and Greg Kiltie can play in those areas of the pitch as well.

“It is something we are dealing with and we won’t use it as an excuse.”

Stephen Robinson highlighted the virtues of Ryan Flynn after the midfielder triggered an extension clause in his contract which sees him remain at St Mirren next season.

The 34-year-old is the Paisley side’s longest-serving first-team player having joined the club in January 2018 when the Buddies were on their way to winning promotion to the cinch Premiership.

Flynn has made 139 appearances for St Mirren – 23 this season – and has taken his first steps into coaching after undertaking his UEFA B Licence.

He joins the likes of Greg Kiltie, Marcus Fraser, Mark O’Hara, Trevor Carson and Richard Taylor in extending their contracts in recent months and St Mirren manager Robinson is delighted.

He told the club’s official website: “Ryan brings vast experience and quality to the club.

“He’s shown he can still go into the team and do well in numerous positions.

“As a squad player, he’s fantastic, and as an experienced professional, he’s exactly what we need at the football club.

“He’ll get involved in a little bit of the coaching in the first team as well and I want him to be a part of what we are doing.

“It’s vital to have experienced players. They dictate the tempo of training, the gym work and the attitude around the place.

“The older boys in the squad are the ones who do a bit for me in terms of helping manage the players and it’s important he stayed given his quality and what he offers on the pitch as well.”

Ange Postecoglou criticised Celtic's "work ethic" as the Scottish Premiership champions suffered a first league defeat in 364 days at St Mirren on Sunday.

Mark O'Hara headed the Paisley side ahead in the first half, before Jonah Ayunga added a second after the break to inflict a first defeat on Celtic since September 19 last year.

The loss was just Celtic's second in their past 27 visits to St Mirren, and Postecoglou accepted his side were well off their usual standards. 

"We just weren't aggressive both in action and in thought," he said. "We kind of tried to ease our way into a game of football and you just can't do that. You've got to be at it from the start and we weren't. 

"You don't put it down to one of those days; it's a disappointing day. We pride ourselves on having certain standards and we didn't reach those. And football will always teach you that lesson.

"What has got us to this point over the past 15 or 16 months is having a certain work ethic and certain levels of performance and belief. We didn't reach any of those. We've got to take the hits when they come and we've just got to get back up and go again.

"We've done that before as a team over the past 15 or 16 months. It's a sore one, it's one that we've got to use as the fuel we need next to get going again.

"We were nowhere near the levels we want to be. Credit to St Mirren. They worked really hard and were really committed to their game plan. They made it hard for us, but we never hit the levels we need to play our football. It's about dusting ourselves off and getting going again."

Celtic have a two-point lead over bitter rivals Rangers at the Scottish Premiership summit ahead of the international break.