Former world number one Serena Williams suffered an injury scare less than two weeks ahead of the Australian Open when she was forced out of the Brisbane International with a badly twisted ankle.
Kim Clijsters's preparations for her Australian Open defence later this month were also given a severe shake-up when she squandered a blistering start before she beat Serbia's Ana Ivanovic.
The French Open champion continued her individual form resurgence at the Hopman Cup on Tuesday but was unable to prevent China's 2-1 defeat by Spain in the mixed teams event.
Roger Federer staked his claim as one of the favourites for the Australian Open title later this month by romping into the second round of the Qatar Open.
Rafa Nadal admits he is having to take risks to achieve the level required to win back the world No 1 ranking.
Grand Slam record-holder Roger Federer believes his capacity for playing through pain is one of the reasons he can challenge for the top titles again in 2012.
Chinese star Li Na showed she had put her post-French Open slump firmly behind her with a commanding win over Spain's Annabel Medina Garrigues at the mixed teams Hopman Cup on Tuesday.
Alex Corretja will be Spain's new Davis Cup team captain for the next two years, the country's tennis federation (RFET) said in a statement on Tuesday.
Seven-times grand slam champion Venus Williams will still play the Australian Open despite withdrawing from her scheduled warm-up tournament in New Zealand for health reasons, according to tournament director Craig Tiley.
Seven-times grand slam champion Venus Williams has withdrawn from her Australian Open warm-up event in New Zealand due to "health reasons," placing her participation in the year's first grand slam in doubt.
With three Grand Slam and five Masters titles, the world number one ranking, a 70-6 win-loss record and a record prize money haul of 12.6 million US dollars, Serb Novak Djokovic was arguably the king in 2011.
Tennis world number two Rafa Nadal and his uncle Miguel Angel Nadal sold their 10 percent shareholding in Spanish football team Real Mallorca on Monday, the club said in a statement.