Another rookie set to join the F1 grid as Red Bull 'decide' which driver will replace Sergio Perez for 2025

Red Bull have already made their decision on which driver will replace Sergio Perez at Red Bull for 2025 and it could land an opportunity for yet another rookie to join the grid.

Following the announcement from Sauber that F2 championship leader Gabriel Bortoleto would be making the step up to F1 next year, the only remaining seat for 2025 is at RB.

However, there is still considerable doubt over the future of Perez at Red Bull, despite the Mexican signing a contract extension in June.

Speaking ahead of last weekend's Brazilian Grand Prix, Christian Horner confirmed Perez's seat is not safe despite having a contract for 2025.

"Look, it's a performance-based business," he told The Associated Press.

"There comes a point in time that difficult decisions have to be made. We're now third in the Constructors' Championship.

"Our determination is to try and get back into a winning position, but it's going to be a tall order over these next four races," Horner added.

The uncertainty around Checo's future has put the spotlight on both RB (Red Bull's junior team) drivers who are both desperate for a shot at the big team and according to Gazzetta Motori, a decision has been made.

The report states that if Perez is to leave as expected, he will be replaced by Liam Lawson, 22, who replaced Daniel Ricciardo following the Singapore Grand Prix rather than the longer-serving Yuki Tsunoda.

Lawson has put together some incredible showings since getting his opportunity after scoring points in his first race despite starting from the pits.

Liam Lawson and Yuki Tsunoda for RB - Getty

If Lawson is promoted, that would leave yet another vacant seat at RB and the report claims the decision on who will occupy that has also already been decided.

Despite Argentinian youngster Franco Colapinto lighting up the track for Williams Red Bull are reportedly going to stick to their own junior program and promote French F2 driver Isack Hadjar.

Hadjar sits third in the F2 standings and has been highly rated throughout his junior career by Red Bull.

If this is the move Red Bull plans to make it would leave Colapinto seatless, and unable to return to F2 due to competing in too many F1 races.