Jurgen Klopp said Arsenal's crucial penalty was "a very soft one" after Bukayo Saka's confident strike from the spot condemned Liverpool to a 3-2 defeat at Emirates Stadium.
The loss is unmistakeably damaging for Liverpool, who have won just two of their opening nine games now in this Premier League campaign and are not looking like contenders.
They twice equalised against Arsenal, with Darwin Nunez and Roberto Firmino scoring, but Saka's second goal of the game meant it was the hosts who edged a five-goal thriller.
Thiago Alcantara's challenge on Gabriel Jesus in the 73rd minute gave Arsenal their spot-kick, with referee Michael Oliver's decision upheld by VAR, even though there appeared to be only slight contact.
That can be enough, although the decision was plainly not to Klopp's liking.
He told BBC Sport: "Now I saw it and I think you can imagine I don't think it is a clear penalty, it is a very soft one."
He said Liverpool should have cleared the danger before Thiago and Jesus collided, after Arsenal rained shots on the visitors' goal earlier in the attack.
"A couple of things went against us, but we are not blind, we see we could have done better in moments," Klopp said. "In general, it was a good away game against a good side. We caused them a lot of problems but stand here with no points."
Liverpool sit 10th after eight matches, with only 10 points, and they already trail Arsenal by 14 points and Manchester City by 13 points, albeit holding one game in hand.
There were positive moments for Liverpool, but Arsenal were the more impressive side, and next Sunday's Anfield tussle with Pep Guardiola's City looks a daunting one for Klopp's players.
Rumblings over a seven-year itch might persist if wins prove slow in coming, with Klopp having previously left Mainz and Borussia Dortmund after chalking up such a tenure. He has now completed seven years at Liverpool.
Oozing sarcasm, Klopp said injuries to Trent Alexander-Arnold and Luis Diaz were "the icing on the cake" for Liverpool.
"It doesn't look good for both," Klopp said.
Liverpool might come good soon, but their manager will understand the harsh reality of results such as Sunday's.
"I saw a team with the right attitude and put in a proper fight and play football, and first half we did, but in the second half I didn't see these football moments as much," Klopp said.
"I think the game is a draw, but today we have nothing."
Van Dijk insists he will be part of Liverpool's transition from Klopp
Virgil van Dijk says he will be "part of" the big transition following Jurgen Klopp’s departure at the end of the season.
The German will leave Liverpool after nine years in charge, with a deal agreed for Feyenoord manager, Arne Slot, to replace him.
Van Dijk, who signed for Liverpool in January 2018, is going into the final year of his contract, and admitted he has not heard anything about an extension.
"There is nothing for me to discuss because there is no news," Van Dijk said.
"I think the club is very much busy with who is going to be the new manager and that is the main focus.
"I am very happy here. I love the club, and you can see that as well. It’s a big part of my life already. The focus is now on the last two games and then the club will focus on who the new manager is and there will be a big transition, and I am part of that.
"When the season is over and there is news, we will focus on what is coming next, but it is a fact that there will be a lot of changes happening, and it will be interesting. I am here to be a part of that and looking forward to it.
"I am the captain, so I want to help, I will help, and I should help. If he [Slot] is the one who comes, then let’s see.
"There will be a lot of changes happening. I wouldn’t say scary is the right word, but it is quite interesting and exciting what will happen now."
Liverpool beat Tottenham 4-2 on Sunday, putting recent setbacks behind them to return to winning ways at Anfield.
The Reds won the EFL Cup in February, and though a Premier League title now looks unlikely, Van Dijk is hopeful that they can finish Klopp’s reign strongly.
"Listen, if you said at the start of the season that this is how it would have gone, then I think we would have taken that," he added.
"We are winners, and we were close. We weren’t good enough in the decisive moments, but that is life. We have to stick together, and we will.
"A few of us have been in title races and on the losing sides at times and it hurts. But we have to take this experience with us, and you only improve if you learn and that is the aim, and we can take that into next season. We want to give the manager a good farewell and do it for ourselves as well."
Postecoglou: Spurs have a confidence problem to overcome
Ange Postecoglou says that Tottenham need to "overcome" their low confidence after suffering a 4-2 defeat to Liverpool on Sunday.
Spurs slipped to their fourth consecutive Premier League defeat, being left to bemoan their slow start as they found themselves 4-0 down by the hour mark thanks to goals from Mohamed Salah, Andrew Robertson, Cody Gakpo and Harvey Elliott.
Richarlison came off the bench to salvage some pride for Spurs, scoring one before setting up Son Heung-min for a goal on his 300th Premier League appearance.
Spurs had the opportunity to cut the gap to the top four after Aston Villa’s defeat to Brighton, but they remain seven points off a Champions League spot.
Postecoglou’s side still have a game in hand over the Villans, though he was sure that Spurs would be able to put their recent poor run behind them.
Asked if Spurs had a confidence problem, Postecoglou told Sky Sports: "Maybe in the front third there is.
"It probably is a bit of a lack of confidence, but again, that's something the guys have to work through.
"You have to find a way to overcome that because, ultimately, if you don't put pressure on the opposition in the front third after you've worked your way up there, they're going to get comfortable with their position."
Spurs have won just one of their last nine Premier League away games, failing to win any of the last five.
Despite that run extending at Anfield, Postecoglou highlighted what he thought was an improvement on their recent performances.
He continued: "Obviously a hugely disappointing outcome for us but at least we were more like ourselves today in terms of our football.
"Our last two away games at Newcastle and Chelsea, apart from the results which weren't great either, we just didn't try and play our football.
"I thought today, even in the first half, some of our football, our pressing was back to where it should be."
Klopp hails 'special' Anfield following Tottenham win
Jurgen Klopp says Anfield "was a special place" after Liverpool got back to winning ways at home against Tottenham in the Premier League on Sunday.
The Reds cruised into a 4-0 lead against Spurs by the 59th minute as Mohamed Salah and Harvey Elliott played starring roles, with Andrew Robertson and Cody Gakpo also getting on the scoresheet.
They were set up for a slightly nervous finish by Spurs, with substitute Richarlison coming on to score and assist late on to half the deficit to 4-2 by the final whistle.
Victory kept Liverpool’s very slim title hopes alive after a recent dip in form that saw them take just one win from five before this, and Klopp was pleased with the Reds’ reaction in his penultimate game at Anfield.
"We are outstanding until we are not," the German told Sky Sports. "It was a really good game. Tottenham can put pressure on Aston Villa again for the Champions League. In high-performance things, you need a spark.
"Anfield was a special place today. We were 4-0 up, I made the changes, and we lost organisation. Tottenham showed how good they could be. I was happy with the performance.
"We were good in pretty much all areas offensively. The passes were good. So many things were good. We stayed calm. As long as they don't break the lines, then it's fine. Let them pass. I liked our game a lot. The goals were outstanding.
"You do it when you do it and if you miss it, then you miss it. If we win all three, then we can achieve the fifth-highest points tally of Liverpool.
"I would be lying if I said I was at my highest emotion, but I have another game. In two weeks’ time is another day. I have said it before, I love absolutely everything about this club."
Salah was restored to the starting line-up against Spurs after making headlines last weekend for a spat with Klopp on the sideline before he was brought on as a substitute.
He scored the opening goal for Liverpool and became the first player in Premier League history to score 10+ goals and provide 10+ assists in three consecutive seasons. He is also only the second player to tally 10+ in both in five separate seasons in the competition overall, after Wayne Rooney.
After assuring that the rift between him and Salah was resolved in the build-up to this game, Klopp was quick to praise his star man.
He added: "Mo was outstanding, he played a really good game. His side with Harvey [Elliott] was good. I was pleased for him.
"None of the boys want to play not great, why would they? Mo showed what he is capable of."
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