Lewis Hamilton top in US GP practice as Vettel struggles

Listen to coverage of final practice and qualifying for the United States Grand Prix across BBC Radio 5 live sports extra, BBC Sport website and mobile app

Championship leader Lewis Hamilton was in scintillating form as he set the pace for Mercedes in second practice at the United States Grand Prix.

Hamilton's title rival Sebastian Vettel could manage only third quickest, 0.524 seconds behind the Mercedes, and behind Red Bull's Max Verstappen.
Hamilton leads Vettel by 59 points and will take the title if he wins the race and the German is lower than fifth.
Vettel suffered a spin at Turn 19, costing him significant track time.

Hamilton showed off a special red helmet during second practice

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Title win on the cards?

Hamilton has won four of the five races held at the Circuit of the Americas in Austin, Texas, and heads into the weekend on a run of four wins in the past five races.
His form has dramatically turned the championship around, after Vettel had led it all season until Hamilton took the lead with victory in Italy in early September.
Vettel then had a terrible run in the three Asian races, crashing out in Singapore at the start and then hitting engine problems in both Malaysia and Japan.