South Africa's Kevin Anderson came from a set down to beat Bernard Tomic from Australia and clinch a quarter-final place at the ATP 1000 Rogers Cup in Toronto on Thursday.

Meanwhile, Kei Nishikori neat Rajeev Ram in straight sets.

Last 16 day in Toronto at the Roger Cup on Thursday.

Early on 12th seed Bernard Tomic faced the big-serving South African, Kevin Anderson.

Tomic had never lost to Anderson previously and the Australian quickly found his rhythm.

6-4 he took the opening set.

Anderson has suffered a lean time on the ATP Tour of late but benefited from the retirement of Austria's Dominic Thiem in the previous round.

Here at 1-1 set all and a break up, Anderson had Tomic on the backfoot.

Tomic would hold, yet couldn't deny Anderson the win.

Anderson earning a quarter-final tie against second seed Stan Wawrinka of Switzerland.

It was much more straightforward for third seed Kei Nishikori of Japan who beat Rajeev Ram of the United States 6-3, 6-4.

The world number six wrapped things up in one hour and eight minutes to book a quarter-final meeting against either Croatian Ivo Karlovic or Grigor Dimitrov of Bulgaria. The pair play later on Thursday afternoon.