Prince Global has renewed its sponsorship of Mike and Bob Bryan, the American brothers who hold the record for all-time winningest doubles team, male or female. They also won the 2012 U.S. Open and a gold medal at the London Olympics. They will continue to use Prince's EXO3 Rebel 95 racquet and Beast XP strings. Also as part of the partnership, Prince will utilize the Bryans in various marketing and social media activities. Prince has also renewed a partnership with John Isner, the current top-ranked U.S. tennis player in the circuit. He will continue to use his Prince EXO3 Warrior 100 racquet and wear the brand's footwear. Isner has been playing with Prince products since 1994.