Aussies out of Delray Beach ATP comp Australia was left without a representative at the Delray Beach International Tennis Championships after both Marinko Matosevic and Mathew Ebden were eliminated in the opening round on Tuesday. World No.39 Matosevic, Australia's highest-ranked male player, managed to take a set off Japan's Go Soeda before eventually going down 2-6 6-4 7-6 (8-6) in a hard-fought clash. Ebden meanwhile was easily defeated by American wildcard Jack Sock 6-3 6-3. Second-seeded Tommy Haas of Germany advanced to the second round when Igor Sijsling of the Netherlands retired from their match with an injured left ankle. The first two sets were split with Sijsling winning the first 7-5 and Haas the second at 6-4, before the Dutchman called it quits. The 74th-ranked Sijsling hit a return in the ninth game and crumbled to the floor with the injury before Haas held onto his serve. Sijsling then stepped up to serve at 4-5 in the second set. Frustrated at going behind 0-30, Sijsling belted three balls into the stands, hitting a spectator with one of the balls. He received a code violation warning, lost his serve which evened the score at one set apiece, and retired from the match. "What a strange match," Haas said. At 4-all, first point, I saw him falling to the ground. Sometimes you don't know how to react when someone is injured, but he looked like he was in pain. The first couple of points went my way and he started to smash balls out of the stadium and hit a spectator. You never want to win a match like that. It's not a proud win for me. Haas will next face Denis Istomin of Uzbekistan. Istomin defeated Benjamin Becker of Germany 6-7 (7-3) 6-4 7-5. Qualifier Ernests Gulbis of Latvia, who won first ATP tour title at Delray in 2010, beat American veteran James Blake 6-1 6-4. Ryan Harrison lost to qualifier Daniel Munoz-De La Nava of Spain 6-2 1-6 6-3, squandering a 3-1 lead in the final set.