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Surgery may sink Serena's US Open

TENNIS: Serena Williams is in doubt for the US Open because of her recent foot injury, according to the WTA Tour.

Williams cut her right foot on broken glass at a restaurant shortly after winning Wimbledon. The tour said last week she needed surgery and would miss three tournaments leading up to the Open.

Now tour spokesman Andrew Walker said Williams is questionable for the final Grand Slam of the year.

Williams' return to the Open has been widely anticipated because of her tumultuous semi-final loss there last year, when she threw a tirade at a line judge at the end of a match against Kim Clijsters and was fined a record $82,500.

Eoghan to Grace Exeter

RUGBY UNION: English side Exeter have continued their squad strengthening ahead of their first season in the Aviva Premiership by signing Munster academy and Shannon flanker Eoghan Grace.

The 22-year-old was a member of the Ireland under-20s' 2007 Grand Slam-winning squad and has also played international sevens.

Meanwhile, Adam Ashley-Cooper has regained the starting full-back spot while Nathan Sharpe and Will Genia have been recalled from injuries for Australia's Tri-Nations opener against defending champion South Africa.

Scrumhalf Ruan Pienaar and flanker Ryan Kankowsi are among four changes in South Africa's starting lineup for the Brisbane clash on Saturday.

Ruan Pienaar will start behind the pack in favour of Ricky Januarie, who was dumped from the 22 for the match at Lang Park, and Kankowski comes in for Francois Louw in the back row. Winger Gio Aplon has replaced the suspended Jean de Villiers, while prop BJ Botha comes in for CJ van der Linde.

AUSTRALIA (v South Africa): A Ashley-Cooper, J O'Connor, R Horne, M Giteau, D Mitchell, Q Cooper, W Genia; R Brown, D Pocock, R Elsom (captain), N Sharpe, D Mumm, S Ma'afu, S Fainga, B Robinson.

SOUTH AFRICA: Z Kirchner, G Aplon, J Fourie, W Olivier, B Habana, M Steyn, R Pienaar; P Spies, R Kankowski, S Burger, V Matfield, D Rossouw, BJ Botha, J Smit (captain), G Steenkamp.

Warne salutes Swann

CRICKET: Australia legend Shane Warne ranks England's Graeme Swann as the world's most improved cricketer and believes he has the ability to spin his side to a famous Ashes victory this winter. Swann, 31, has enjoyed a dream run since making a belated Test debut in 2008 -- more than eight years since his first call-up.

BASEBALL -- MLB: Pittsburgh 1 Milwaukee 3, Baltimore 1 Tampa Bay 8, Detroit 6 Texas 8 (14 innings), Florida 9 Colorado 8, Cincinnati 7 Washington 2, St Louis 8 Philadelphia 4, Chicago Cubs 5 Houston 11, Kansas City 5 Toronto 4 (10 innings), Minnesota 4 Cleveland 10, Arizona 13 NY Mets 2, Oakland 1 Boston 2, LA Dodgers 2 San Francisco 5, Seattle 1 Chicago White Sox 6.