It is just a matter of time before Sergio Perez replaces Felipe Massa at Ferrari, according to Martin Whitmarsh.
Perez, who is on the books of Ferrari as an academy driver, has been linked with the Italian outfit since he made the step up to Formula One last year and the rumours will no doubt intensify over the next couple of weeks after his impressive display at Sepang.
The young Mexican came from P9 on the grid to finish second behind Fernando Alonso at the Malaysian Grand Prix.
With Massa struggling to make to make much of an impact so far this year, a lot people believe Ferrari will axe the Brazilian and bring Perez in, and Whitmarsh believes it could happen before the Chinese GP on April 15.
"He was a revelation, I imagine he has put a bit of pressure on Mr Massa," the McLaren team principal said.
"I don't know what the odds are on him switching teams before China, but there must be consideration."
Ferrari, meanwhile, have dismissed the reports as speculation with team boss Stefano Domenicali telling Sky Sports F1's Ted Kravitz that it is "just not true".