The German driver is returning from a one-season absence from Formula 1, having been re-signed by the Force India team.
The 30-year-old told Autosport.com: "Everything went very well [in Friday's practice sessions]. I had good work with my engineer. We did several runs on different tyres, but we didn't change much on the set-up.
"Our focus is to the front, and after that we confirmed we are strong, and competitive in the front of the midfield.
"So we have to take all the chances we get. Everything is possible. Tomorrow there is rain expected so it will be pedal to the metal and to the front."
Qualifying for Sunday's race takes place tomorrow at 6am GMT.