World No 1 men's player Novak Djokovic powered through his opening game of the $5.4 million China Open on Tuesday following a shaky start, while five-time Grand Slam winner Maria Sharapova also won.

The men's third seed in Beijing, Tomas Berdych, joins Djokovic in the second round after winning his game, but it was heartbreak for women's world No 6 Agnieszka Radwanska, who became the highest seed to tumble so far.

Djokovic made an emphatic start to the tournament, defeating Guillermo Garcia-Lopez of Spain 6-2, 6-1 in just 63 minutes.