Michael Schumacher makes impressive return to F1 in first day of official testing for 2010 . Seven-time world champion is third fastest in Spain , racing 40 laps for Mercedes . Ferrari 's Felipe Massa , making his comeback after six months out , is quickest in Valencia . - Formula One teams are set to begin their pre-season tests at the Circuit de Catalunya on Thursday with a test session scheduled for Friday morning and another one planned for Saturday afternoon.
Michael Schumacher makes impressive return to F1 in first day of official testing for 2010 . Seven-time world champion is third fastest in Spain , racing 40 laps for Mercedes . Ferrari 's Felipe Massa , making his comeback after six months out , is quickest in Valencia . World champion Jenson Button and McLaren teammate Lewis Hamilton sit out session .