Australia, Spain open Hopman with wins; Petkovic retires

Andrea Petkovic was forced to retire with a right knee injury.

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PERTH, Australia (AP) -- Australia beat Germany 2-0 in the Hopman Cup mixed team competition on Saturday after Andrea Petkovic had to retire from her singles match with a right knee injury.

Bernard Tomic had given Australia a 1-0 lead with by beating Tommy Haas 7-6 (6), 3-6, 7-5, but Petkovic looked likely to force the series into a decisive mixed doubles when she won the first set 6-4 against 16-year old Ashleigh Barty. However, she called for treatment and was in tears as her right knee was bandaged.

Spain clinched a 2-1 victory over South Africa after winning the mixed doubles 6-4, 6-7 (3), 10-8.

Kevin Anderson had given South Africa the lead by beating Fernando Verdasco 7-6 (5), 6-4, before Annabel Medina Garrigues evened the contest with a 6-4, 6-2 win over Chanelle Scheepers. The Spanish duo then outlasted the South Africans in the Champions tiebreaker of the doubles match.

Earlier, Tomic hit 14 aces to overcome his more experienced opponent. Haas led the first set tiebreaker 6-1 before Tomic swept the next seven points. A forehand error at 4-3 gave Haas the only break of the second set, and the German broke again early in the third. But Tomic leveled at 5-5 and broke again before clinching the win on his third match point.

"It was a very tough first set and my first to play for a few months," Tomic said after claiming his first victory since September. "It was difficult to play Tommy. He played really well at the beginning of the tiebreak and I don't know how I got out of that."

South Africa's Anderson held two set points at 5-4 in his the first set of his singles match but made errors on both before winning the tiebreaker. The South African then broke at 4-4 in the second before serving out the match.

Scheepers maintained the pressure in the second set as Medina Garrigues faced eight break points. However, the Spaniard broke for 3-1, fought off five break points to hold for 5-2 and broke serve again when she converted her second match point.

"I was a little bit lucky," Medina Garrigues said. "The doubles was also tough, one and a half hours, but Fernando was playing good and now we have to recover (to face France) tomorrow."