Alonso already considering Renault exit

Fernando Alonso has revealed he could be forced to leave Renault if the performance of his car does not improve before the end of the season.

After leaving McLaren in acrimonious circumstances at the end of 2007 having been pipped to the drivers' title by a point by Ferrari's Kimi Raikkonen, 26-year-old Alonso knew that this year's Renault would be a step down in terms of performance.