As pressure mounts on Sergio Perez to deliver better results, talk has turned to who might replace the Mexican at Red Bull. Perez failed to score any points at the British Grand Prix following an error in qualifying that put him at the back of the grid and a strategy gamble in the race during the wet conditions that did not pay off. He is now down to sixth in the Drivers’ Championship behind Oscar Piastri and is expected to be overtaken by both Mercedes drivers if they continue their upward trajectory. Performance clauses in Perez’s contract were revealed which state that the Mexican cannot be…