Lewis Hamilton has admitted there was some tension between Pedro de la Rosa and himself following the news that the Briton had landed the second racing seat at McLaren for next season.
Spaniard de la Rosa was Hamilton's main rival for the drive after racing for the team in the last eight races of the 2006 season following Juan Pablo Montoya's exit.
De la Rosa, McLaren's test driver since the 2003 season, lost out to the young British driver, who will partner Fernando Alonso at the team in 2007.
Both Hamilton and de la Rosa had to work together yesterday, as Formula One testing got underway again, and the GP2 champion revealed there was some tension between the two.
"It was quite tough because there was a bit of tension between myself and Pedro," Hamilton said. "We are friends but we didn't know who was to get the drive. Now it is out in the open we can get on with developing the car."
Hamilton admitted, however, that de la Rosa has been supportive since learning he would not race for the team next season.
"Pedro has been supportive. He is very professional and a driver I've looked up to him for many years," Hamilton said during testing at Barcelona.
"I can learn a lot from him. I am here to do my job so I will just focus on that."