World number one Novak Djokovic made a serene start to the defence of his China Open title as he brushed aside Lukas Rosol in straight sets.
Djokovic needed less than an hour to dispose of his Czech opponent and dropped only three games on his way to an emphatic 6-0 6-3 success.
The Serb - who is aiming for his fourth title in five years in Beijing having missed the 2011 renewal through injury - sent down four aces and not a single double-fault during a dominant display.
Having been blown away in the first, Rosol did make more of a fight of things in the second set and forced a couple of break points of his own.
But he was unable to convert and a single break proved enough for Djokovic who will now face Fernando Verdasco in the second round after the Spaniard's 7-6 (8/6) 6-3 win over India's Somdev Devvarman.
Although Djokovic currently holds top spot in the world rankings, he will be usurped by Rafael Nadal should the Spaniard reach the final this week and he opened in solid style with a 6-2 6-4 win over Colombian qualifier Santiago Giraldo.
Solid start for Nadal
Nadal eased through the first set with little fuss, but the second proved a more see-saw affair with the Spaniard breaking his opponent three times but also being broken twice himself before eventually sealing victory.
Next up for the US Open champion will be a second round clash with Germany's Philipp Kohlschreiber.
Fourth seed Tomas Berdych progressed after a comfortable success in the final match of the day, beating Spain's Pablo Andujar 6-4 6-1.
There were also wins for seeded trio Richard Gasquet, Stanislas Wawrinka and John Isner.
Gasquet came through in straight sets against Germany's Florian Mayer, but Wawrinka and Isner both had to come from a set down to see off Andreas Seppi of Italy and China's Wu Di respectively.
Elsewhere on Tuesday, Marinko Matosevic of Australia beat France's Julien Benneteau 7-6 (7/5) 6-3, America's Sam Querrey overcame Russian Mikhail Youzhny 7-6 (7/3) 6-3, while another Russian, Nikolay Davydenko, saw off Yen-Hsun Lu 7-6 (7/3) 6-4.