Beijing - World No 1 Novak Djokovic kicked off the defence of his China Open title with a ruthless 6-0, 6-3 first round win over Lukas Rosol on Tuesday.
Djokovic, who could lose his top ranking to Rafael Nadal this week, needed just 54 minutes to crush his Czech opponent's resistance, without hitting a single double fault in a dominant display.
The Serb, aiming for his fourth China Open title in five years after missing the 2011 tournament through injury, went into the match with a perfect 14-0 record in the event.
Nadal needs to reach the final in Beijing to reclaim the No 1 ranking and began his Beijing campaign with a 6-2, 6-4 win against Colombian qualifier Santiago Giraldo.
Results from the China Open in Beijing on Tuesday (x denotes seeding):
Richard Gasquet (FRA x5) bt Florian Mayer (GER) 6-3, 7-6 (7/2)
Stanislas Wawrinka (SUI x6) bt Andreas Seppi (ITA) 4-6, 6-3, 6-4
Fernando Verdasco (ESP) bt Somdev Devvarman (IND) 7-6 (8/6), 6-3
Sam Querrey (USA) bt Mikhail Youzhny (RUS) 7-6 (7-3), 6-3
Novak Djokovic (SRB x1) bt Lukas Rosol (CZE) 6-0, 6-3
John Isner (USA x8) bt Wu Di (CHN) 5-7, 7-6 (7/4), 6-3
Marinko Matosevic (AUS) bt Julien Benneteau (FRA) 7-6 (7/5), 6-3
Rafael Nadal (ESP x2) bt Santiago Giraldo (COL) 6-2, 6-4
Serena Williams (USA x1) bt Francesca Schiavone (ITA) 6-4, 7-5
Carla Suarez Navarro (ESP x12) bt Lauren Davis (USA) 6-4, 6-2
Sabine Lisicki (GER x13) bt Venus Williams (USA) 6-1, 6-2
Roberta Vinci (ITA x10) bt Zhang Shuai (CHN) 3-6, 6-3, 6-1
Maria Kirilenko (RUS) bt Urszula Radwanska (POL) 6-4, 6-4
Caroline Wozniacki (DEN x6) bt Monica Niculescu (ROM) 6-3, 6-1