Mike and Bob Bryan are twin brothers and the most successful doubles tennis players of all time, but Mike is having second thoughts about their pairing after shopping at Tennis Warehouse. He says the store's huge selection inspired him to change things up -- that is, change partners. On cue, the equally renowned Bethanie Mattek-Sands appears and takes Mike away from his dismayed brother. She declares Tennis Warehouse has everything you need to step up your game...except a new partner. Sorry, Bob!