Giancarlo Fisichella led home his team-mate Fernando Alonso to complete a Renault clean sweep at the Malaysian Grand Prix.
The Italian had started from pole and made the most of problems for his rivals behind to record his first win since the Australian Grand Prix a year ago.
Renault boss Flavio Briatore has furiously dismissed suggestions that his team is deliberately hampering Giancarlo Fisichella?s season.
While Fernando Alonso has enjoyed a virtually flawless year, team-mate Fisi has suffered a series of technical troubles since winning the season opener in Melbourne.
Giancarlo Fisichella says his Renault will still be stronger than Ferrari's new car which makes it race debut in Sunday's Bahrain Grand Prix.
Ferrari are rushing the F2005 model into use after disappointing results in the first two races of the season.
Fisichella said: "It means they're convinced they can win. But...
While the Australian Grand Prix may not have been his maiden F1 victory, it was the first chance that Renault driver Giancarlo Fisichella had to celebrate victory from the top step of the podium.
Although the Italian picked up his first F1 success while driving for Jordan at the Brazilian Grand Prix in 2003, an error...