Kei Nishikori will become the first Japanese to crack the top 10 of the ATP rankings following a 6-4, 6-4 victory over Spain's Feliciano Lopez in the Madrid Open quarterfinals on Friday.

The 24-year-old Nishikori is currently 12th in the world, and his previous high was 11th which he reached in June last year. In the WTA, only Kimiko Date-Krumm and Ai Sugiyama have made the top 10, ranking as high as Nos. 4 and 8, respectively.

"I'm happy about it because it's been a huge goal of mine all along, but it means nothing if I'm there for only a week," said Nishikori, who will face another Spaniard in David Ferrer in the semifinals.