AUSTIN, Texas -- Sebastian Vettel's slim title hopes may have taken another hit after he was summoned to the stewards following first practice at the U.S. Grand Prix.
Vettel is being investigated for speeding under red flag conditions during the opening practice session, which has the potential to carry a three-place penalty on Sunday's grid. The incident happened 40 minutes into the session after running was suspended due to gravel being dragged onto the circuit by Charles Leclerc's Sauber.
When a red flag is shown, all drivers are required to drive to a reduced pace and return to the pits.