ATP World Tennis results

Following are the results from the fourth day of the $1.3 million ATP World Tennis Tournament in Rotterdam Thursday (prefix number denotes seedings), according to Xinhua.

Second round:

1-Juan Martmn del Potro, Argentina, bt Paul-Henri Mathieu, France, 6-2, 7-6

3-Tomas Berdych, Czech Republic, bt Nicolas Mahut, France, 6-4, 6-3

Jerzy Janowicz, Poland, bt 6-Tommy Haas, Germany, 6-4, 6-4

Ernests Gulbis, Latvia, bt 8-Grigor Dimitrov, Bulgaria, 6-4, 7-6

Philipp Kohlschreiber, Germany, bt 4-Richard Gasquet, France, 7-5, 7-5

2-Andy Murray, Britain, bt Dominic Thiem, Austria, 6-4, 3-6, 6-3

Igor Sijsling, Netherlands, bt Michael Berrer, Germany, 6-1, 6-2

Men's doubles:

Quarterfinals:

Mariusz Fyrstenberg/Marcin Matkowski, Poland, bt Lukas Rosol, Czech Republic/Andreas Seppi, Italy, 6-4, 6-4

Julien Benneteau/Edouard Roger-Vasselin, France, bt Julian Knowle, Austria/John Peers, Australia, 3-6, 6-1, 10-7