Cincinnati: World number one Novak Djokovic brushed aside Switzerland´s Stan Wawrinka in straight sets to advance to the semi-finals of the ATP and WTA Cincinnati Masters Friday.
The top-seeded Serb breezed past Wawrinka with little difficulty in just over an hour, winning 6-4, 6-1 to avenge his defeat to the Swiss in the French Open final.
Djokovic will face Ukrainian qualifier Alexandr Dolgopolov, who upset Czech sixth seed Tomas Berdych 6-4, 6-2.
In other men´s quarter-finals on Friday, Richard Gasquet of France faces Britain´s Andy Murray while second seed Roger Federer plays Spain´s Feliciano Lopez.
World number one Djokovic improved to 18-4 over Wawrinka, hailing what he described as a welcome return to form.
Djokovic is on a mission to finally win Cincinnati and become the first player in history to claim all nine Masters 1000 trophies.
He has lost four finals here, two apiece to Andy Murray and Roger Federer.
Women´s holder Serena Williams swept the last six games to overhaul Ana Ivanovic 3-6, 6-4, 6-2 in a repeat of the 2014 final won by the American.
In other women´s quarters, third seed Simona Halep was playing Anna Schmiedlova, French Open finalist Lucie Safarova was facing Elina Svitolina and former champion Jelena Jankovic was taking on Anastasia Pavlyuchenkova.