Kei Nishikori of Japan advances to Memphis final when Matosevic retires with blistered foot

Kei Nishikori, of Japan, returns a shot to Marinko Matosevic, of Australia, in a semifinal round tennis match at the U.S. National Indoor Championships on Saturday, Feb. 23, 2013, in Memphis, Tenn. (AP Photo/Mark Humphrey) (The Associated Press)

Kei Nishikori, of Japan, waves to the crowd as he leaves the court following his win against Marinko Matosevic, of Australia, in a semifinal round tennis match at the U.S. National Indoor Championships on Saturday, Feb. 23, 2013, in Memphis, Tenn. Matosevic retired from the match because of an injury. (AP Photo/Mark Humphrey) (The Associated Press)

Kei Nishikori of Japan advanced to the final of the U.S. National Indoor Championships when Australian Marinko Matosevic retired Saturday with a blistered right foot after losing the first set 6-4.

Nishikori will play either Feliciano Lopez of Spain or Denis Istomin of Uzbekistan on Sunday looking for his third career title and first since winning in Tokyo last October. No. 5 Nishikori was the only seed to advance out of the quarterfinals after he ousted top-seeded Marin Cilic of Croatia.

Matosevic led 2-0 before Nishikori broke back, and the 23-year-old player broke Matosevic again to go up 4-3. Matosevic then called for a trainer to bandage the ball of his right foot.

Nishikori served out and won the set in 37 minutes. Matosevic then retired.