Coco Vandeweghe in semis of the Porsche Tennis Grand Prix Stuttgart 2018

STUTTGART, Germany
CoCo Vandeweghe stormed into the first clay-court semifinal of her career with a stunning 6-4, 6-1 upset of No.1 seed Simona Halep in one hour and 14 minutes - a result that means the unseeded 26-year-old has now won her last three matches against World No.1s.