Part of complete coverage on
Redfoo's party rock can't lift tennis ace Azarenka's injury gloom
March 22, 2013 -- Updated 2139 GMT (0539 HKT)
Victoria Azarenka and LMFAO singer Redfoo at a players' party at the IW Club on in Indian Wells, California on March 7.
- World No. 3 Victoria Azarenka pulls out of Miami tournament due to ankle injury
- She was also forced to withdraw at Indian Wells due to the problem
- Azarenka's popstar boyfriend Redfoo has released a song dedicated to her
- He is a keen tennis player and has entered qualifying for the U.S. Open this year
(CNN) -- Her popstar boyfriend has written a song about her "heart of a champion," but Victoria Azarenka is struggling to get on court at the moment.
The Belorussian is unbeaten in 17 matches this year, but she has now suffered her third withdrawal of the season after a late pullout at the Miami Masters on Friday.
She cited the ankle injury that forced her to miss last week's quarterfinal against Caroline Wozniacki at Indian Wells, allowing Maria Sharapova to take the No. 2 ranking spot from her.
"The last two days I tried to practice, which did not get better so it just gives me a very obvious indication that it's not possible for me to play," Azarenka told reporters at Key Biscayne, where she was champion in 2009 and 2011 and this year had a first-round bye.
Azarenka on 'amazing' Australian win
Chris Evert: Grooming future champions
Radwanska: Playing Serena was tough
"Today I went on the court and I got more pain. I cannot really move. It makes me very frustrated."
The Australian Open champion has been dating LMFAO's Redfoo, whose new song "Heart of a Champion" samples the tennis star's trademark grunting and includes the lines "You gotta start aggressive, Keep your feet moving, You gotta really want it, With everything you're doing."
It even apparently alludes to her controversial Australian Open semifinal against Sloane Stephens, when the 23-year-old angered fans by taking a lengthy medical break at a crucial point in the match against the U.S. newcomer, citing breathing difficulties.
The chorus includes: "When you're losing your breathing, Your body is sore, To be the last one standing, In the eye of a storm, It takes the heart of a champion."
Redfoo, the son of Motown Records founder Berry Gordy, is a keen tennis player himself and has entered in regional qualifying playoffs for this year's U.S. Open.
The 37-year-old rapper will try to get through in both singles and doubles, in which he will partner Ayaka Okuno, 17, who he has been coaching.
"It's always been a dream of mine to play professional tennis," he said in a statement last week.
Azarenka's withdrawal allowed 19-year-old Lauren Davis into the main draw, and she took her chance -- saving three match points against Madison Keys before beating her fellow American 6-1 5-7 7-6 (9-7) in the second-round match.
There was also a walkover in the men's event in Miami, as third seed David Ferrer progressed to the third round after Russia's Dmitry Turnsunov pulled out due to illness.
The Spaniard will next play Italian 32nd seed Fabio Fognini.
Part of complete coverage on
June 30, 2014 -- Updated 1135 GMT (1935 HKT)
When Agnieszka Radwanska refused to look her opponent in the eye after losing at Wimbledon, it raised more than eyebrows.
June 23, 2014 -- Updated 0114 GMT (0914 HKT)
It's 10 years since a teenage Maria Sharapova became the darling of Wimbledon's hallowed Center Court, launching herself as a star.
Rafael Nadal is still the "King of Clay" -- but his crown has slipped a bit, says CNN's Will Edmonds.
May 23, 2014 -- Updated 0746 GMT (1546 HKT)
He's regularly voted France's favorite famous person, but many of the nation's youth have "no idea" about his glorious sporting past
May 5, 2014 -- Updated 2359 GMT (0759 HKT)
The Ukrainian-born, British tennis star loses fight against liver cancer, just a few weeks after revealing that she was battling the disease.
April 29, 2014 -- Updated 1555 GMT (2355 HKT)
Five-time grand slam champion Martina Hingis has followed her mom into a coaching role, setting up a new tennis academy in Barcelona, Spain.
April 16, 2014 -- Updated 1238 GMT (2038 HKT)
It's no easy matter becoming a world class tennis player. It's even harder when everyone (really -- everyone) is calling you the "new Martina Hingis."
April 2, 2014 -- Updated 1420 GMT (2220 HKT)
At the 2009 Australian Open, French men's tennis was the talk of the town.
April 15, 2014 -- Updated 1800 GMT (0200 HKT)
Rafael Nadal may be most at home on a clay tennis court, but he has always found comfort on the sea.
March 21, 2014 -- Updated 1107 GMT (1907 HKT)
Tennis star Venus Williams reveals how she is beating the autoimmune disease that derailed her career.
March 5, 2014 -- Updated 1014 GMT (1814 HKT)
After two decades dedicated to the game, Amelie Mauresmo wants a second life -- one away from tennis.
Almost five years to the day after reducing Roger Federer to tears at the Australian Open, Rafael Nadal shed a few in his own loser's speech.
Today's five most popular stories