Kei Nishikori has defeated Grigor Dimitrov in straight sets to reach the second round of the Shanghai Masters.
The Japanese 12th seed broke his Bulgarian opponent instantly before a second break allowed him to clinch the opening set 6-3.
Nishikori then saved three break points midway through the second set as he went on to the seal the victory 6-4.
He will now face Frenchman Benoit Paire with a place in the third round at stake.
