- Serena battles past Ivanovic into Stanford semis
- Petkovic downs Venus to reach Stanford semis
- Raonic, Gasquet advance to Washington semis
- Raonic, Young advance to Washington semis
- Venus topples birthday girl Azarenka
- Nishikori fights into ATP showdown with Gasquet
- Pospisil dumps top seed Berdych, Raonic wins
- Raonic ousts Hewitt, giant-killer Johnson next
- ATP Kitzbuehel Cup results - collated
- ATP Kitzbuehel Cup results - 3rd update
- ATP Kitzbuehel Cup results - 2nd update
- ATP Kitzbuehel Cup results - 1st update
- Li Na to sit out US Open with knee injury
- Serena on song in WTA return at Stanford
- Some 'licking their chops' at Nadal absence
- Berdych, Raonic win, Isner falls at Washington
- Raonic, Nishikori win, Isner out at Washington
- Lepchenko shocks Radwanska in Stanford
- Nishikori advances to third round at Washington
- Injured Nadal in US Open battle after Toronto, Cincinnati pullout
- Injured Nadal out of Toronto, Cincinnati
- ATP Kitzbuehel Cup results
- Venus advances, Serena set for WTA return at Stanford
- Venus advances at Stanford with Serena up next
- Isner hopes to keep rolling into the US Open
- No fear for confident Nishikori against stars
- WTA Stanford results - 1st lead
- ATP and WTA Washington Open results - 2nd lead
- Rafa, Novak back in charge says No. 5 Berdych
- ATP and WTA Washington Open results - 1st lead
Li Na's ankle recovery slower than hoped
China's Li Na will miss an exhibition match in Hong Kong after an ankle injury she sustained in last month's Australian Open final failed to respond well enough to treatment, organisers said Wednesday.
The announcement comes weeks after the world number five also withdrew from the $2.3 million Qatar Open.
The 31-year-old twisted her ankle twice during her three-set loss to Victoria Azarenka in Melbourne just over one month ago and "has not responded enough to intense treatment", said a spokesman for the exhibition match.
Li was scheduled to face Denmark's Caroline Wozniacki at the BNP Paribas Showdown in Hong Kong on March 4.
She said: "Unfortunately, the ankle injury I had in the Australian Open final is still not ready for me to compete.
"I know I have some of the best fans who live in Hong Kong and I was looking forward to playing for them. I promise I will be back next year."
Fans will be anxious for Li to recover in time for the French Open in May, a tournament she won in 2011 to make her the first player from Asia to achieve a Grand Slam singles title.
World number four Agnieszka Radwanska, meanwhile, will take Li's place in Hong Kong.