DELRAY BEACH, Fla., Feb. 26 (UPI) -- Second-seeded Tommy Haas of Germany led the group that advanced to the second round of the Delray Beach International Tennis Championships Tuesday.
Haas, who won the Florida tournament in 2006, moved up when his opponent, Igor Sijsling of the Netherlands, retired with an ankle in the second set.
Sijsling pulled up with the match tied 5-7, 6-4. Haas will face Denis Istomin of Uzbekistan in the round of 16.
Istomin advanced by ousting Germany's Benjamin Becker 6-7 (3), 6-4, 7-5.