A top Formula 1 pundit has called on Red Bull to make an immediate change to their driver line-up.
The team currently hold a healthy advantage over Ferrari in the 2024 constructors' championship, and look well on course to make it three titles in succession.
Max Verstappen continues to set the pace amongst the drivers, and recently extended his lead over Lando Norris after finishing one place ahead of his McLaren counterpart at last weekend's British Grand Prix.
Despite the Dutchman being some way off his best this season, he remains firmly on track to be crowned world champion for the fourth straight year.
Perez's latest performances have raised questions over whether the decision to offer a new deal was a mistake, with rumours building that he may be replaced long before that contract expires.
Reserve driver Liam Lawson will take part in testing this week, and having impressed on his five previous outings, is eager to show himself as a viable option for the Milton Keynes-based team to consider.
Ex-F1 driver Robert Doornbos believes Perez is now 'out of excuses' and that a change must be made.
Speaking on Ziggo Sport, the Dutchman said: "Liam Lawson is testing that car, Max and Checo’s, the RB20, on this same circuit. You have to put him in, you have to do something now.
“You have no excuses anymore - the data does not lie.
“It’s a very difficult situation for Red Bull, because they let it fester for too long.”
Doornbos also shares the view that Red Bull were too quick to re-sign Perez, suggesting it was largely down to keeping the Verstappen family happy.
“I just feel the pain of that boy [Perez]," he added. "He made sure that this was done quickly, also because the Verstappen family wanted that.
“They wanted Perez to just sign, and get away from all those distractions with Carlos Sainz and everyone who was lurking on that seat.”