World number two Halep ousted Garbine Muguruza 6-3, 4-6, 6-4 to meet second seed Pliskova who eased past fellow Czech Marketa Vondrousova 6-2, 6-4. Wimbledon Champion Halep held off a fightback from her Spanish rival.

After pulling level at a set all, the ninth seed slumped to 5-1 down in the third, before pulling out a string of winners to draw the match back to 4-5. Serving to stay in the match, though, she hit successive double faults to hand Halep victory.

Halep extended her winning streak this season to 13 consecutive victories, with her last defeat coming against Muguruza in the Australian open.