MELBOURNE, Australia -- The all-star cast of walking wounded continued to improve heading into the Australian Open, with Rafael Nadal, Caroline Wozniacki, Serena Williams and defending champion Kim Clijsters all reporting progress with their respective injuries. Nadal has had a sore left shoulder, Wozniacki an inflamed left wrist, Williams a sprained left ankle and Clijsters left hip spasms. The Spanish left-hander has played through the injury since it cropped up late last season, while Wozniacki required treatment during the deciding set of her quarter-final loss at the Sydney International on Wednesday. Williams pulled out of the Brisbane International last week after twisting her ankle while winning a second-round match, and Clijsters retired from her semifinal. On Thursday, WTA spokesman Eloise Tyson said Wozniacki had an MRI exam on her wrist that "showed no major damage." "Its inflamed, and she will continue to have it monitored and its hopeful she will play the Australian Open," Tyson said. Williams said "the ankle is better" during a promotional appearance Thursday. "Its not 100 per cent, but its better than it was last week," she said. "I feel great. And I feel like Im really fit. And I feel like this is definitely some of the fittest I have been in my career." Nadal, at an official appearance for the tournaments vehicle sponsor, said "my shoulder is good. Ill try to do my best." Clijsters had a scan on her hip, which showed she had not suffered a muscle tear. On Thursday, she trained at Melbourne Park freely and looked to be in strong shape to defend the title she won last year. On Wednesday, Andrea Petkovic withdrew from the Open with a stress fracture in her lower back that could keep her sidelined for two months. The 24-year-old German was seeded 10th. Petkovic lost 7-5, 6-4 to Agnieszka Radwanska of Poland in a second-round match at the Sydney International on Tuesday. She needed an injury timeout during the match to receive treatment. She released a statement saying shed been having back problems for three or four months. Petkovic said doctors advised her it will take six to eight weeks to recover. Roger Federer, a four-time Australian Open champion, pulled out of a tournament in Qatar last week with a sore back, but has been training in Melbourne without any apparent issues over the past five days. Maria Sharapova withdrew before the Brisbane tournament with an injured ankle, but has been training in Melbourne ahead of the Monday start of the tournament. Venus Williams, the elder of the Williams sisters, pulled out of the Australian Open on Monday, prolonging her absence from the WTA tour because of an autoimmune disease that can cause fatigue and joint pain. 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Members of that Arizona team will gather this weekend to commemorate the 10th anniversary of that seven-game triumph, a series acclaimed as one of the most dramatic in history, one that ended with Luis Gonzalezs ninth-inning single off Mariano Rivera, a base hit that barely made it to the outfield grass.LUCERNE, Switzerland -- Tracy Cameron of Shubenacadie, N.S., and Victorias Lindsay Jennerich captured the womens lightweight doubles event Sunday at the World Rowing Cup. Canadian rowers also captured silver and bronze medals, giving the team four overall in the competition. Cameron and Jennerich, the 2010 world champions, won their race in a time of seven minutes 1.71 seconds. Great Britain was second in 7:03.81 with an American duo third in 7:04.81. "Its always harder to be chased than to do the chasing, and when you come into the season as the world champions thats always in the back of your mind," said Jennerich. "You cannot just rest on what you achieved in the past." This event was the lightweight doubles first major test of the season. "It really came together for us again at our Italian training camp before the World Cup," said Cameron. "Im happy with our progress so far this season, we just have to stay on track and our next focus is Bled (Slovenia)." Thats where the world championship will be held later next month and also serve as an important Olympic qualification regatta. The Canadian womens eights team finished second in its race. The world-champion Americans were first in 6:28.35 despite trailing Canada for most of the race. The Canucks were second in 6:29.41 while the Netherlands finished third in 6:31.73..dddddddddddd The Canadian squad consisted of: Lesley Thompson-Willie and Ashley Brzozowicz (both of London, Ont.), Krista Guloien of Port Moody, B.C., Winnipegs Janine Hanson, Darcy Marquardt of Richmond, B.C., Natalie Mastracci of Thorold, Ont., Montreals Andreanne Morin, Cristy Nurse of Georgetown, Ont., and Reginas Rachelle Viinberg. "The race was so exciting. I could feel the power from the first stroke and everyone felt really committed and connected," said Mastracci. "We learned at lot this year early in the season, and had some great training, and what we saw (Sunday) was a nice culmination of all our hard work." Victorias David Calder and Scott Frandsen of Kelowna, B.C., were third in the mens pair. This marks their first season back together since capturing a silver medal at the 2008 Beijing Summer Olympics. A New Zealand squad finished first in 6:21.76 followed by Great Britain in 6:28.16. The Canadians were next in 6:29.47. "It was a bit bumpy in the middle -- there was a bit of a wake or something, but we raced well," said Frandsen. "We want to win of course, but we are happy with the way we performed." The lightweight mens doubles team of Cam Sylvester of Caledon, Ont., and Doug Vandor of Dewittville, Que., was fourth in its race. And the Canadian mens eight had a similar finish in its event. ' ' '