PARIS (AP) — At age 39, Novak Djokovic can still wear opponents down. Even opponents nearly half his age — and in front of a hostile crowd. Djokovic came back from a set down for a 5-7, 7-5, 6-1, 6-4 victory over 22-year-old home player Giovanni Mpetshi Perricard in the first round of the French Open on Sunday in his record 82nd Grand Slam appearance . “Obviously playing a French player, center court at Roland Garros is never so easy. The crowd gets into it and then you feel the pressure even