Alonso briefly led then but when he pitted on Lap 17 Button went to the lead .
Vettel continued to build a strong lead but his pit stop on lap 16 was slow and he was fitted with hard compound tyres due to a radio communication error .
Alonso briefly led then but when Vettel pitted on Lap 17 Button went to the lead .
Vettel continued to build a strong lead but his pit stop on lap 16 was slow and he was fitted with hard compound tyres due to a radio communication error .