Del Potro beats Ramos-Vinolas in Beijing opener

US Open finalist Juan Martin del Potro on Tuesday reached the second roundof the china open after defeating Spain's Albert Ramos-Vinolas 7-5 6-2.

Del Potro, playing his first match since losing to Novak Djokovic in the US Open final last month, played a fair game as he fired 10 aces and won 86 per cent of points on his first serve to seal victory in 90 minutes.

The 30-year-old Argentine can qualify for next month's ATP Finals in London for the first time since 2013 if he reaches the final in Beijing.

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He will now face Russia's Karen Khachanov.