Novak Djokovic pulled his championship tennis back together after last week's early exit, beating Gilles Simon 6-3, 4-6, 6-4 to reach the third round of the ATP-WTA Cincinnati Masters here Tuesday.
The world number one was ambushed at the same stage in Toronto a week ago by eventual champion Jo-Wilfried Tsonga.
Latvian Ernests Gulbis needed a pair of tiebreakers to advance over Ivan Dodig 7-6 (8/6), 7-6 (7/4).
Croatian 14th seed Marin Cilic advanced into the second round over Toronto semifinalist Feliciano Lopez 6-3, 6-4 while British qualifier James Ward surprised Spaniard Guillermo Garcia-Lopez 6-2, 3-6, 6-1.
Canadian Vasek Pospisil rallied to put out Czech Radek Stepanek 5-7, 6-1, 7-6 (7/4) as wild card Robby Ginepri beat Dominic Thiem of Austria 6-3, 5-7, 7-5.
In women's play, fifth seed Maria Sharapova overcame American Madison Keys 6-1, 3-6, 6-3, with the Russian changing clothes at the end of the second set and starting the third refreshed.
Czech 16th seed Lucie Safarova knocked out Montreal finalist Venus Williams, 6-7 (2/7), 6-3, 6-4.