Lewis Hamilton said there had been no contact with rival Formula 1 team Ferrari about the seven-time world champion joining themLewis Hamilton says he has not been in talks with Ferrari and he and Mercedes are close to agreeing a new contract to keep him at the team beyond this season.Hamilton's deal with the Silver Arrows runs out at the end of this season.He said he had a team working with Mercedes team principal Toto Wolff on the new contract.This week, there have been reports that Ferrari had contacted Hamilton about him switching to the Italian team.Hamilton said Mercedes' struggles…