Maximum Effort: watch @donaldyoungjr and Feliciano Lopez engage in a cat and mouse rally from their tense R3 encounter at the 2007 #USOpen! How about a 🙌🏼 for this throwback from a decade ago! _ #grandslam #tennis #summertennis #flushingmeadows #donaldyoung #felicianolopez #instatennis #summer #throwback