The final four spots in this year's Madrid Open has been decided; Simona Halep vs. Belinda Bencic and Petra Kvitova vs. Sloane Stephens. They will fight for the two spots in the final on Friday.

All four women have seen success so far this year, especially Bencic who already has one title under her belt, the Dubai Tennis Championships. Now, choose who you think has the best chance of winning the tournament.