Novak Djokovic_Cincy

CINCINNATI, August 14: Spain’s Tommy Robredo toppled world number one Novak Djokovic 7-6 (8/6), 7-5 on Thursday to reach the quarter-finals of the Cincinnati Masters.

It’s the second straight week that Wimbledon champion Djokovic has slumped to defeat in the third round of an elite Masters level event, after an exit at the same stage in Toronto.

The Serb will now have to regroup before the final Grand Slam of the year, the US Open which starts August 25 in Flushing Meadows.

Third-seeded Australian Open champion Stanislas Wawrinka made the Cincinnati Masters quarter-finals on Thursday with a 3-6, 6-0, 6-1 win over Croatia’s Marin Cilic.

The Swiss goes on to tackle France’s Julien Benneteau, who put out Poland’s Jerzy Janowicz 7-5, 6-1, for a place in the semi-finals.

World number one Serena Williams eased past Italy’s Flavia Pennetta 6-2, 6-2 to reach the Cincinnati WTA quarter-finals on Thursday. She will face fellow American Sloane Stephens or Serbia’s Jelena Jankovic for a place in the semi-finals.