Roger Federer vs. Kei Nishikori
This match is less clear to me. Roger is playing better than Kei through two rounds, but Roger also has less to play for entering Thursday. I think Roger wants to win his group in order to set up a potential Djokovic vs. Nadal semi with Roger likely playing Murray or Wawrinka in the other semifinal match. Nishikori can bother Federer if he is returning serve well and robbing time by hovering around or inside the baseline. Roger can negate some of this by utilizing varried spins, getting to the net, and serving well. A few SABRs would not hurt Roger’s chances on this surface either. If Roger imposes his will on the match, he is likely to win.
My Prediction: Roger Federer d. Kei Nishikori 6-4, 6-4