Sergio Perez on top for Sauber at end of third day of final winter Formula 1 test
|By Jamie O'Leary||Saturday, March 3rd 2012, 16:09 GMT|
Sergio Perez remained on top of the timesheets for Sauber on day three of the final pre-season Formula 1 test at Barcelona on Saturday, despite not improving on his morning mark
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