Sebastian Vettel dominates practice at Ferrari . It was the biggest margin at the end of any practice session this season to underline his recent dominance . F1 championship leader fastest in one minute 38.125 seconds sessions . Sebastian Vettel star can clinch third straight world title this weekend . Nearest challenger Fernando Alonso second fastest for Ferrari in third runs .
Sebastian Vettel dominates practice at Ferrari . F1 championship leader fastest in one minute 38.125 seconds sessions . Sebastian Vettel star can clinch third straight world title this weekend . Nearest challenger Fernando Alonso second fastest for Ferrari in third runs .