Sharapova recently dropped out of the world's top 50 because of a shoulder injury and hasn't played a singles tour match since August.
In Jan 2007, Sharapova became the first tennis player to represent PepsiCo€™s Gatorade and Tropicana brands in a deal that expired at the end of last year.
€œThere is no particular reason other than that the contract has ended, with both parties mutually deciding to go their own way,€ said a New York-based spokesman for Pepsi, who struck a deal with Sharapova in 2007 worth a reported $1 million.