The 27-year-old Finn had his first Formula One test for the Italian glamour team at a damp Vallelunga circuit on Tuesday.
The Colombian has promised Williams he will do all he can to help them win the constructors' title.
The Renault driver said with a bit of passion and luck, and good performance from the car, he can win the US Grand Prix.
Formula One teams return to the racetrack on Tuesday for the first tests of a new "post war" era, as well as one without Michael Schumacher.
The Ferrari driver believes Sunday's Spanish Grand Prix will not be the same without the excluded BAR team and Jenson Button.
Narain Karthikeyan finished 17th in the first qualifying round at the San Marino Grand Prix
Last season, the Ferrari driver left Magny-Cours after winning his fifth world title with six races to spare.
Tell us which you feel were Michael Schumacher's best and worst races.
A summary of sports events and sports persons, who made news on Tuesday
The Indian driver was happy with his timing at the dusty Bahrain track, where the temperature was high too.
Rediff Readers catch up to talk about Formula 1.
The 23-year-old Finn has 48 points compared to the 44 of Ferrari's second-placed Michael Schumacher.
The world champion made it clear that he could never forgive or forget what happened in Monza.\n
Adam Peaty hopes to emulate retired American great Michael Phelps, the only swimmer to win gold in the same event at three successive Games, at the Paris Olympics.
The Indian driver says he would like to take the place of Williams test driver Alex Wurz's, who has been promoted as one of the team's two race drivers.
The 21-year-old Alonso has a star quality like no other Spaniard in Formula One since the 1950s.
World champions Michael Schumacher finished sixth.
Formula One world champion Fernando Alonso is confident he can stop Michael Schumacher's winning run in his Ferrari rival's home German Grand Prix this weekend.
The 35-year-old German takes on world rally champion Sebastien Loeb and the best that America can offer in a charity race in Paris on Saturday.
American cyclist Lance Armstrong, who won his fourth consecutive Tour de France this year, was voted foreign sportsperson of the year by the Spanish daily newspaper El Pais.
The six times world champion took the chequered flag at Imola 5.783 seconds ahead of team mate Valtteri Bottas, who started on pole position.
Ferrari's technical director said the Finn is an exceptional driver who doesn't appear to make many errors.
Summary of sports events and persons who made news on Sunday
McLaren were back, ending their biggest slump of the last two decades to emerge as winners for the first time since March last year, and so too was real racing.
Rediff's Formula One fanatics in a chat after the Melbourne Grand Prix.
Lewis Hamilton seized pole position in the dying seconds of qualifying for the first Portuguese Grand Prix in 24 years on Saturday to deny and dismay Mercedes team mate Valtteri Bottas once again.
