Mike and Bob Bryan, US tennis champions planning on competing in the London games, have nice set of Celebrity Endorsement deals including K-Swiss, Olympus, Prince, Oakley and Nesquik. However, does the general public who this identical pair of brothers are? Probably not. While the fact that the Bryans are twins AND professional tennis partners is a stand out attribute, doubles tennis is hardly relevant in today's sporting world. Nonetheless, as the Olympics take over our summer, I'm sure these guys will be in the headlines once or twice. So while we may not know them now, we will in a few months. Citi is betting on it - or they may not receive a return on their investment.