JENSON BUTTON and Fernando Alonso experienced two starkly different debuts with their new teams yesterday, and for the reigning world champion it proved to be an uncomfortable day.

Felipe Massa today returned to the cockpit of a competitive Formula One car for the first time in six months.

Lewis Hamilton escaped unhurt following an accident during a test session with McLaren in Valencia this afternoon.

McLaren test driver Alex Wurz continued his fine form as he set the fastest time once again in testing on day two in Valencia.