AUSTIN, Texas (AP) - Red Bull's Max Verstappen was fastest in a bumpy, chilly first practice Friday ahead of the U.S. Grand Prix, where Mercedes driver Lewis Hamilton can secure his sixth career Formula One championship.

Ferrari's Sebastian Vettel was second, 0.169 seconds behind Verstappen. Red Bull's Alex Albon was third. Hamilton was a distant eighth in the session on a track where he's won five times since 2012.

The session was notable both for temperatures in the 50s and the bumps on the 7-year-old Circuit of the Americas that bounced cars around several sections of track. Several drivers struggled to negotiate turn 19 of 20, running too wide and causing their laps to be not counted.

When IndyCar raced on the same circuit in March, that series let the cars run wide at the same turn. Formula One race stewards are enforcing strict track limit rules.

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