Kimi Raikkonen, the only man standing between 24-year-old Alonso and the title, made an error in qualifying for the Brazilian Grand Prix. and starts on the third row in fifth place.
McLaren set the pace in Friday's Brazilian Grand Prix practice with Colombian Juan Pablo Montoya the fastest race driver.
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.
World champion Michael Schumacher qualified fifth fastest for Sunday's Monaco Formula One Grand Prix.
Kimi Raikkonen went further, saying he had no intention of leaving McLaren.
India's Narain Karthikeyan will start 19th on the grid on Sunday's Turkish Grand Prix.
Fernando Alonso feels Sunday's inaugural Turkish Grand Prix could play to Renault's strengths.
Force India regained fifth position in the team standings with a double points finish at the Formula One Singapore Grand Prix at the Marina Bay Street Circuit on Sunday.
Kimi Raikkonen will start Sunday's British Grand Prix from pole position after a flying qualifying lap that showed McLaren were back in business.
The International Automobile Federation (FIA) said in a statement that it was reviewing Sunday's race result after a timing discrepancy came to light.
The McLaren driver suggested that whoever he signed for, it would be something of a gamble.
The Spaniard will replace the Colombian at McLaren for the rest of the season.
The Finn, second in the Formula One championship to Renault's Fernando Alonso, suffered a blown engine in Friday's first free practice.
Ferrari's Michael Schumacher and Rubens Barrichello finished second and third respectively.
Germany's Nick Heidfeld was second for Williams with Australian team mate Mark Webber third for his first podium finish.
Renault's championship leader Fernando Alonso was pushed off the front row for his home Spanish Grand Prix.
Narain Karthikeyan finished 17th in the first qualifying round at the San Marino Grand Prix
The Indian ace's Jordan-Toyota E15 developed electrical problems and he was forced to retire in the Bahrain Grand Prix.
Rediff's Formula One fanatics in a chat after the Melbourne Grand Prix.
The Flying Finn was clipped by Christian Klien's Red Bull and spun off the track
Team mate Sebastian Vettel was second fastest to complete the front-row sweep, with championship leader Lewis Hamilton third for Mercedes.
The 22-year-old McLaren driver needed to win or finish ahead of team mate Fernando Alonso and Kimi Raikkonen at the Chinese Grand Prix to win the world title but his race ended when he slid off the asphalt and into the gravel when approaching the pit lane.
