AUSTIN -- Sebastian Vettel believes his Ferrari will be quick at this weekend's U.S. Grand Prix despite a series of problems during Friday practice.
The Ferrari driver has seen his title hopes fall apart at the last three rounds and, with four races remaining, trails Lewis Hamilton by 59 points in the drivers' standings.
He was third fastest in Friday practice at Austin, 0.524s off Hamilton, but needs to beat the Mercedes driver on Sunday in order to retain a realistic chance of winning the championship.
A spin at the penultimate corner in the second session and a problem with the front of his car during his long runs meant Vettel was limited to just eight laps on Friday afternoon, but he remains confident his car has solid underlying pace.