Reigning F1 world champion Lewis Hamilton continues to chase his teammate Nico Rosberg in Texas. With four rounds remaining Rosberg holds a 33-point lead over Hamilton with four races left this season.
Hamilton has won the past two races held in Austin, Texas and another victory for him this weekend would put the pressure on Rosberg.
However, Hamilton is winless after the German Grand Prix. Since then, Rosberg has won four races of five which helped him to make this points gap.
In Japan, the Brit had a bad start in the race. But he recovered to finish third in the race with Rosberg on the top step of the podium. Hamilton knows what changes are needed to the car, so he can reduce the gap with Rosberg.
Hamilton said, "It has been an ongoing thing all year long - perhaps more work than in other areas. I was working on it at the factory last week and we hope we have a better formula this weekend."
Four-time world champion Sebastian Vettel backs Hamilton for this year's title run. He believes that the Brit can catch Rosberg.
The Ferrari driver said, "It's realistic because I think he's quick enough. It's realistic because there's a lot of points to get and I think it would be quite bad if you quit now.
"If I could swap, I would immediately and go for it, so I'm sure that he goes for it and four races is a lot of laps to do, a lot of things that can happen so it's only over when it's over."