MADRID OPEN: After Rafael Nadal's loss, the semifinals hold fresh intrigue. Here are the final four by the numbers.
MADRID OPEN: Karolina Pliskova is the highest-ranked player in the semifinals, but who has been the best on clay this season?
MADRID OPEN: Defending champion Rafael Nadal looks to start his campaign with a win, while Novak Djokovic aims to capitalise on his defeat of Kei Nishikori.
MADRID OPEN: Why Novak Djokovic's win over Kei Nishikori feels different, and moments that have made an impact.
MADRID OPEN: Simona Halep targets a third straight Mutua Madrid Open crown. But it's a strong draw.
MADRID OPEN: The second Masters 1000 event of the clay-court season has thrown up an intriguing draw.
INTERVIEW: A professional tennis umpire talks nerves, life on tour, and replacing humans with Hawk-Eye.