New Balance has sealed an endorsement deal with Reilly Opelka, a promising 17-year American tennis player, who became Wimbledon Juniors champion this year. The American brand will be Opelka's official apparel and footwear provider for competition, training and lifestyle. Raised in Florida, Opelka has been part of the USTA Player Development program in Boca Raton, and is coached by Diego Moyano. Other endorsees of New Balance's tennis products include Milos Raonic, Heather Watson and Nicole Gibbs.