Red Bull technical director Pierre Wache has said the Austrian-based teams RB20 "didn't deliver what was expected" in every area this season.
Red Bull claimed a sixth Constructors' Championship in 2023, with Max Verstappen winning his third World Drivers' Championship in a row, scoring 575 points, which was more than double of second placed team-mate, Sergio Perez.
Despite their dominance, the team wanted to remain at the top of the grid and made significant changes to this year's RB20.
Verstappen and Perez would secure three one-two finishes in the first four Grand Prix's of the season, but performances of late have seen the team's around them close in.
Both McLaren and Mercedes have continually improved and have looked competitive since May, with Wache saying the cars' performance this year has fallen below expectations.
"I would say not really. We improved compared to last year, without doubt, but we didn’t deliver what we expected in some areas," Wache told Motorsport.com.
"Especially in the high-speed corners we expected a little bit more than what we have. Without thinking about the competitiveness of the car, so just based on our own references, we expected a little bit more with our tools.
"In medium-speed and low-speed we improved quite a lot compared to last year. We were a little bit weaker in the high-speed corners compared to last year relative to the competition.
"In kerb riding we are clearly weak, but we were already last year. I think we didn’t make the improvement we expected in that aspect."
While Verstappen still holds a comfortable advantage over McLaren's Lando Norris in the Drivers' Championship, the same cannot be said for the Constructors'.
McLaren are now just 42 points behind Red Bull, with Ferrari just 11 points behind the British-based team.
That subsequent dip in results has largely been down to the form of Perez, who is yet to finish on the podium since the Chinese Grand Prix in April.
Verstappen's fourth placed finish at the Belgian Grand Prix last time out was also the first time since 2020 that the Dutchman had failed to win a race in four attempts.
Despite their recent form, it did not come as a surprise to Wache, who said he expected the rival teams to catch up as the season went on.
"We expected the opposition to come earlier, to be honest with you," Wache added. "When we started the 2022 season, we didn’t have the quickest car.
"Ferrari had the quickest car in the beginning of 2022. We expected a massive competition in 2023, but that didn’t happen.
"In 2024 we also expected the competition to be there more or less from the start, because the performance you can find with the car is limited under the same regulations.
"After the first four or five races the others came back, maybe with a bit of delay, but we expected that from the start.
"The limitations you have with these regulations are quite high and what you can find to make more steps is getting more difficult. Then it is almost sure that the opposition will come back at some point."
Singapore Grand Prix: Confident Piastri ready to help Norris fight for championship
Oscar Piastri's confidence is high after a win in Baku, but he is willing to do what he can to help Lando Norris win the drivers' championship if called upon.
Piastri beat Charles Leclerc in Azerbaijan last weekend, holding off the Ferrari on a track where they usually dominate, to claim his second win of the season, following up his maiden F1 win in Hungary.
He got a little help from Norris on the track though, as the Brit held off Sergio Perez so that Piastri could emerge from the pits still holding his place.
The Australian remains fourth in the standings himself, now just 32 points behind team-mate Norris, but his victory meant McLaren leapfrogged Red Bull into the lead in the constructors' championship.
Piastri, who has finished on the podium in five of the last seven races, praised the teamwork put in by McLaren so far and is hoping they can continue that going forward.
"It is a nice confidence boost [coming to Singapore]. We should be competitive this weekend," he said.
"It wasn't our most competitive track, there have been races where we have been quicker compared to the competition. So, to win like that where Ferrari were so quick is a confidence boost.
"Lando is still ahead in the championship and, just to be honest, has a more realistic chance to win the drivers' championship.
"But Baku is how we want to go racing as McLaren. We got it across perfectly of our culture and how we want to go racing. I want to win but, naturally, if I can help out Lando's championship bid, I am happy to help."
Max Verstappen, meanwhile, has struggled of late, failing to win any of the last seven F1 races, with his last victory coming in Spain in June.
He still holds a 59-point lead over Norris in the standings, but with just two podiums since his last win, the Dutchman is far from his best.
He acknowledged the other drivers' improvement, especially Piastri, and is hopeful Red Bull can fix some of their issues ahead of a race where they have struggled before.
"Oscar is doing a fantastic job lately and [McLaren] are very strong as a team. So, it is up to us to make it difficult for them. We need to make the car more dependable," he said.
"Our car generally isn't very good on bumps and kerbs, and that is what we have around here, so we need to try and stabilise it.
"I don't know even where to start. I'm confident we can do a better job than last year, but the competition has improved quite a bit."
DRIVERS TO WATCH
Lando Norris – McLaren
Norris has proven a consistent challenger to Verstappen so far this season and took the edge once again in Baku by sneaking in front of him at the end of the race.
It marked the second-biggest comeback of his F1 career (11 places, from 15th to 4th), meaning he has now finished ahead of the 26-year-old in each of the last three races.
However, since Verstappen's last win, Norris has only closed the gap by 10 points in the drivers’ championship.
Sergio Perez – Red Bull
Sergio Perez has endured a difficult run, having failed to make the podium since April in China.
It looked like he would end that run in Baku, only for a late tangle with Carlos Sainz to force him to retire from the race.
No driver in this year's championship has not finished a grand prix more often than the Mexican (three, level with Alex Albon and Yuki Tsunoda), but Red Bull will be hoping he can build on what looked to be a promising race in Singapore.
CHAMPIONSHIP STANDINGS
Drivers
1. Max Verstappen (Red Bull) – 313
2. Lando Norris (McLaren) – 254
3. Charles Leclerc (Ferrari) – 235
4. Oscar Piastri (McLaren) – 222
5. Carlos Sainz (Ferrari) – 184
Constructors
1. McLaren – 476
2. Red Bull – 456
3. Ferrari – 425
4. Mercedes – 309
5. Aston Martin – 82
'He's paid five times more' - Horner rebuffs McLaren's number one driver claims
Red Bull team principal Christian Horner assumes Lando Norris is the number one driver at McLaren because he is "paid five times more" than Oscar Piastri.
Despite Norris being the leading driver in the drivers’ championship standings and the highest-paid racer in the McLaren stable, it has been Piastri who has shone of late.
The Australian claimed his second career win in Baku last time out and has now scored more points (135) in the European leg of the season than any other driver.
Piastri is now 32 points behind Norris in the standings, having taken five top two finishes in his last seven races for the British-based team.
Ahead of the Azerbaijan Grand Prix, McLaren boss Andrea Stella revealed the team would favour Norris in a bid to topple Max Verstappen in the drivers' championship.
However, Horner rebuffed McLaren's claim that they have two number one drivers, suggesting Norris is being paid significantly more than Piastri.
"Usually those are things that are dealt with behind closed doors, those things, so I'm not actually sure what those rules are," said Horner.
"There still seems to be some confusion in them.
"Every team is different. Our rules of engagement are very clear and what the focus is until the end of the year.
"We've got a driver that's fighting for the world championship. It's a team sport. So it's very clear that Checo's job is to support Max until the end of the year.
"Different teams operate different ways. When you've got an asset like Max Verstappen, you don't make him a No 2 driver.
"Lando Norris, they're paying five times what they pay Oscar, so I would assume he would be their number one driver, or their biggest asset.
"So, therefore, the confusion comes when you're not up front from the beginning of what your plans are."
Thanks to McLaren's success in Baku, they now have a 20-point lead over Red Bull in the constructor's championship.
The British-based team now lead the standings for the first time since 2005, but their way to the top has not come without its problems.
During the Hungarian Grand Prix, Norris initially refused to hand first place back to Piastri before team orders were eventually followed to give the Australian his maiden victory in the competition.
But with McLaren's comments about prioritising Norris for the last seven races of the season, Horner believes that decision should have come much sooner.
"I think the other one is causing them headaches because he [Piastri] is winning races, and he's doing a very good job," continued Horner.
"It was like when Daniel Ricciardo came to us in 2014.
"He was clearly meant to be the number two to Sebastian Vettel, and he won three races that year to Sebastian's none. Sometimes it causes you a headache like that.
"For sure, they took Oscar with the expectation, as Mercedes probably did with George [Russell] and Ferrari did with Carlos [Sainz], that you've got a prime asset and a support asset.
"And when the second driver starts outperforming the first driver, that's when you tend to have a headache."
Horner rues 'heartbreaking' Perez crash in Baku
Red Bull team principal Christian Horner insisted Sergio Perez "deserved more" after a "heartbreaking" crash denied him a place on the podium in Baku on Sunday.
Perez, who made a brilliant start to the season only to struggle in recent months, looked set to register his best finish since finishing third at the Chinese Grand Prix in April after comfortably holding P3 for much of the race.
However, Ferrari's Carlos Sainz snuck past him on the penultimate lap, and when the Mexican attempted to regain third place, the two tangled and hit the barrier, forcing them both out of the race.
That meant that George Russell instead claimed the final podium spot alongside winner Oscar Piastri and Charles Leclerc.
"He deserved a lot more," Horner told Sky Sports. "He should've at the very least been on the podium today.
"It was a magnificent race out at the front for so many laps. It was great to be in, it was exciting to be a part of, and it's just disappointing that it came to a close like that when it didn't need to.
"Unfortunately, he lost quite a bit of time on his out laps behind Alex Albon and then Lando [Norris] cost him dearly, which gave Oscar [Piastri] track position. I think without that, he would've won the race today.
"It's one of those things that's very heartbreaking for him and the team that so much effort goes in to lose a podium in the dying laps of the race."
It was a tough day for Red Bull all around, as Piastri's win coupled with Lando Norris crossing the line before Max Verstappen meant that McLaren leapfrogged them in the constructors'’ championship.
Red Bull are now 20 points behind McLaren ahead of the Singapore Grand Prix, and Horner admitted he was not happy with how the tide had turned.
"Very, very disappointing," he added. "[The crash] destroyed the race for Checo.
"It's cost us a lot of damage and obviously vital points in the constructors' championship."
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