Paris, France (4E Sports) – Novak Djokovic rallied from a set down to beat John Isner, 6-7(5), 6-1, 6-2, and set up a quarterfinal clash with fellow ATP World Tour Finals qualifier Stanislas Wawrinka at the BNP Paribas Masters.
The 26-year-old Djokovic broke Isner four times and lost only three points on serve in the deciding set to claim victory in one hour and 50 minutes.
Djokovic leads Wawrinka 13-2 in their head-to-head showdown, winning their last two meetings at the Australian Open and the US Open.
Earlier, Wawrinka booked a spot in the ATP World Tour Finals after Thomas Berdych dashed Milos Raonic’s chances of qualifying via a 7-6(13), 6-4 victory.
Richard Gasquet also qualified for the season-ending tournament, joining Rafael Nadal, Djokovic, David Ferrer, Juan Martin del Potro, Berdych and six-time winner Roger Federer.
Meanwhile, del Potro maintained his winning run with a 3-6, 6-3, 6-4 victory over Grigor Dimitrov in the third round. The Argentine withstood 14 aces to break Dimitrov twice for victory in one hour and 45 minutes.
In the quarterfinal, Del Potro will face Federer, who defeated Philipp Kohlschreiber, 6-3, 6-4, in just over an hour.
Federer leads del Potro, 13-5, in their head-to-head showdown but the 17-time Grand Slam champion lost their previous three encounters.
Defending champion David Ferrer also cruised into the quarterfinals, dismissing French hope Gilles Simon, 6-2, 6-3 in 77 minutes.
On the women’s side, Ana Ivanovic defeated Samantha Stosur, 6-2, 5-7, 6-2, at the Garanti Koza WTA Tournament of Champions on Thursday.
In the other singles match, Elena Vesnina kept her chances of qualifying for the semifinals with a 6-2, 4-6, 6-0 win over Tsvetana Pironkova to improve to 1-1 in Group Sredets.
Group Sredets now has Ivanovic at 2-0, Stosur at 1-1, Vesnina at 1-1 and Pironkova at 0-2. Ivanovic, Stosur and Vesnina all still have a chance to advance to the semifinals.
However, the scenarios all depend on the last wave of round robin matches for the group on Friday, with Ivanovic taking on Vesnina and Stosur taking on Pironkova.