Answer
The answer is 14. Heikki Kovalainen made his Formula One debut with the Renault team in 2007. He was given the number 14, which had previously been used by his teammate, Giancarlo Fisichella. Kovalainen had a solid rookie season, scoring points in five races and finishing as high as fourth in the Japanese Grand Prix. He remained with Renault for the 2008 season before moving to McLaren in 2009.