Cincinnati - Rafael Nadal defeated Grigor Dimitrov 6-2, 5-7, 6-2 on Thursday after a battle to set up a quarter-final contest with Roger Federer at the Cincinnati Masters.
World No 3 Nadal remains undefeated on hardcourts this season after winning titles in Indian Wells and last week in Montreal while Federer has been struggling this season.
Federer is bidding for a sixth title at the tournament while Spaniard Nadal played in the semi-finals in 2008 and 2009.
Results on Thursday from the ATP and WTA Western and Southern Open (x denotes seed):
Men
Third round
Novak Djokovic (SRB x1) bt David Goffin (BEL) 6-2, 6-0
Dmitry Tursunov (RUS) bt David Ferrer (ESP x3) 6-2, 6-4
Juan Martin Del Potro (ARG x7) bt Feliciano Lopez (ESP) 6-4, 1-6, 6-4
Roger Federer (SUI x5) bt Tommy Haas (GER x11) 1-6, 7-5, 6-3
John Isner (USA) bt Milos Raonic (CAN x12) 7-6 (7/5), 6-4
Andy Murray (GBR x2) bt Julien Benneteau (FRA) 6-2, 6-2
Rafael Nadal (ESP x4) bt Grigor Dimitrov (BUL) 6-2, 5-7, 6-2
Tomas Berdych (CZE x6) bt Tommy Robredo (ESP) 6-3, 6-0
Women
Third round
Victoria Azarenka (BLR x2) bt Magdalena Rybarikova (SVK) 6-3, 6-4
Roberta Vinci (ITA x12) bt Sara Errani (ITA x6) 6-4, 6-3
Jelena Jankovic (SRB x14) bt Sloane Stephens (USA) 3-6, 7-5, 7-5
Li Na (CHN x5) bt Angelique Kerber (GER x9) 6-4, 6-4
Agnieszka Radwanska (POL x4) bt Elena Vesnina (RUS) 6-0, 6-2
Serena Williams (USA x1) bt Mona Barthel (GER) 6-4, 6-1
Simona Halep (ROM) bt Samantha Stosur (AUS x11) 6-4, 4-6, 6-2
Caroline Wozniacki (DEN x10) bt Petra Kvitova (CZE x7) 3-6, 6-2, 6-3