Former world number one Serena Williams will make a surprise comeback at the Mubadala exhibition event in Abu Dhabi next Saturday [url=http://www.cheapnbajerseyspistons.com/Joe-Smith-Jersey]Joe Smith Jersey[/url] , as she gears up for her Australian Open title defence in January.

The decision to play in the United Arab Emirates should virtually confirm Williams' participation at Melbourne Park.

The 36-year-old has not played since clinching a 23rd Grand Slam singles title 11 months ago, after revealing she was pregnant during the tournament and taking time off to give birth to her first child [url=http://www.cheapnbajerseyspistons.com/Mateen-Cleaves-Jersey]Mateen Cleaves Jersey[/url] , Alexis Olympia in September.

Williams will return with a match against Latvia's French Open champion Jelena Ostapenko, making them the first women to compete in the previously male-only event.

"I am delighted to be returning to the court in Abu Dhabi for the first time since the birth of my daughter [url=http://www.cheapnbajerseyspistons.com/Isiah-Thomas-Jersey]Isiah Thomas Jersey[/url] ," she said in a statement released by the tournament organisers on Sunday.

"The Mubadala World Tennis Championship has long marked the beginning of the men's global tennis season and I am excited and honoured to be making my comeback as part of the first women to participate in the event."

The former world number one can equal Margaret Court's all-time record of 24 Grand Slam titles, although she will have to make do with a low seeding Down Under after slipping to 22nd in the rankings.

Williams' comeback raises the prospect of a renewal of her one-sided rivalry with Maria Sharapova [url=http://www.cheapnbajerseyspistons.com/Dennis-Rodman-Jersey]Dennis Rodman Jersey[/url] , after the Russian's own comeback earlier this year from a doping ban.

It also provides a boost the Australian Open, after two-time champion Victoria Azarenka pulled out of the warm-up event in Auckland over the ongoing custody battle that has stopped the Belarusian from playing since Wimbledon in July.

Serena claimed an Open-era record 23rd major title by beating older sister Venus 6-4 [url=http://www.cheapnbajerseyspistons.com/Terry-Mills-Jersey]Terry Mills Jersey[/url] , 6-4 in this year's Australian Open final, a feat made all the more remarkable by the fact that she was two months pregnant.

Ostapenko broke through with a stunning French Open title [url=http://www.cheapnbajerseyspistons.com/Joe-Dumars-Jersey]Joe Dumars Jersey[/url] , and the 20-year-old will take on Serena for the first time.

The Mubadala event had already seen men's world number one Rafael Nadal and three-time Grand Slam winner Stan Wawrinka withdraw.

The six-strong men's field in Abu Dhabi does feature Serb Novak Djokovic, who will also be making his comeback.

The 12-time Grand Slam champion has not played competitively since his quarter-final loss to Tomas Berdych at Wimbledon because of an elbow injury.(Agencies)

MADRID， Sept. 23 (Xinhua) -- There is no rest as the sixth round of games in the Spanish Liga Santander kicks off on Friday night to start a weekend which contains two derbies and has one very important absentee.

Matchday six kicks off with an Andalusian derby between Betis and Malaga. Betis are still smarting at the refereeing decision which cost them a draw against Sevilla on Tuesday， while Malaga are fresh from their first win of the season against Eibar.

Eibar are next into action in the early kick off on Saturday as they host Real Sociedad in the second Basque derby of the campaign.

Both sides can be reasonably pleased with their start to the season with Real Sociedad easing a few doubts with Wednesday's 4-1 thrashing of Las Palmas.

Leo Messi is the big-name absentee as Barcelona travel to play Sporting Gijon on the back of their 1-1 draw at home to Atletico Madrid.

A groin injury will keep the Argentinean out of action for at least three weeks and although Barca have more than enough talent to replace him， the question is how his absence will affect the morale of a side which is used to looking to him in difficult moments.

Arda Turan or Paco Alcacer should step into the side， while Sergio Busquets， fresh from signing a new contract， is fit after overcoming a dose of flu.

Second place Sevilla travel to face Athletic Club Bilbao， who have won their last three games and have beaten Sevilla in their last 6 visits to the San Mames stadium， before Real Madrid face a difficult trip to Las Palmas.

Las Palmas were well below their best in their defeat to Real Sociedad， but will look to react against a Madrid side without full back Marcelo and midfielder Casimiro and who left a few question marks hanging with their performance at home to Villarreal on Wednesday night.

Cristiano Ronaldo looked to be lacking fitness once again and it will be interesting to see if coach Zinedine Zidane is willing to give a start to striker Alvaro Morata and continue with James Rodriguez in an attacking midfield role.

Valencia claimed their first points of the season on Thursday and have little recovery time ahead of their visit to Leganes on Sunday lunchtime.

Leganes have won twice on the road， but have yet to dedicate a victory to their fans in the Butarque stadium.

Atletico Madrid were unhappy at being given a Sunday kick off ahead of their Champions League tie on Wednesday， but will be confident of all three points against a weak-looking Deportivo la Coruna.

Villarreal should take confidence from their point away to Real Madrid and are favorites against an Osasuna that is high on effort， but lacking in quality， before Espanyol and Celta Vigo both look for their second win of the week after claiming their first victories of the campaign in the midweek fixtures.

The round of games finishes on Monday when Alaves take on Granada whose coach Paco Jemez could be in danger of the sack if his side lose in Vitoria.

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