No problems for Juan Martin del Potro and Grigor Dimitrov in Beijing

Juan Martin del Potro forehand

Juan Martin del Potro and Grigor Dimitrov booked their places in the second round of the China Open with two-set wins.

Top seed Del Potro got off the perfect start with a 7-5, 6-2 victory over Albert Ramos-Vinolas in one hour and 30 minutes.

The world No 4 broke in the fourth game, but Ramos-Vinolas drew level in game 10 only to lose his serve again in the next game. The second set was straightforward for the Argentine with breaks in game one and six.

Next up for Del Potro is Karen Khachanov after the Russian beat Sam Querrey on Monday.

Third seed Dimitrov advanced courtesy a 7-5, 6-3 result over Tennys Sandgren and he will face Dusan Lajovic from Serbia for a place in the quarter-finals.

Eighth seed Jack Sack was beaten as Nikoloz Basilashvili came from a set down to beat the American 6-7 (6-8), 7-5, 6-2 to set up a clash against Fernando Verdasco, who beat 2-6, 7-6 (7-3), 7-6 (7-5).

Filip Krajinovic also advanced as he beat Mischa Zverev 6-1, 6-4 while Matteo Berrettini beat Leonardo Mayer 6-3, 6-2.

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