Breakfast (tennis) of Champions: Look back at former champions as the men return to 🇨🇦Montreal for the @couperogers 8.4-8.13! #USOpenSeries. #TeamRoger or #TeamRafa 🥄? _ #montreal #atp #tennis #federer #nadal #atpworldtour #tennispro @rogerfederer @rafaelnadal