Man United sells naming rights to training ground, kit in deal with insurance firm Aon

Chelsea's Cesar Azpilicueta, right, vies for the ball with Manchester United's Robin van Persie during the English FA Cup quarterfinal replay soccer match between Chelsea and Manchester United at Stamford Bridge Stadium in London, Monday, April 1, 2013. (AP Photo/Kirsty Wigglesworth) (The Associated Press)

Manchester United has sold the naming rights to its training ground as part of a sponsorship deal with insurance firm Aon estimated to be worth $230 million, a further sign of the Premier League leader's off-field money-making abilities.

The eight-year agreement with Aon starts in July and includes having the company's logos emblazoned on the training kit at United.

Aon's name currently appears on United's main match kit in a $130 million, four-year deal, but General Motors Co.'s Chevrolet division takes over that sponsorship in a $559 million, seven-year deal from the 2014-15 season.

Financial details of the new Aon deal were not publicly disclosed, but it is estimated to be worth $230 million over eight years and will also see the company provide United with business expertise.