Anna Kournikova gave fans their first glimpse of her blossoming baby bump as she stepped out for a stroll in sunny Miami on Tuesday.
The former world no 8 is expecting her fourth child with her partner, Spanish singer Enrique Iglesias, 50, it was revealed last month.
It's thought Kournikova, 44, is already halfway through her pregnancy but only now has her baby bump been spotted.
The Russian, once voted the world's sexiest woman, was pictured stepping out with her son to do some grocery shopping in Miami this week.
Wearing a casual all-black outfit and a pair of matching sunglasses, Kournikova's bump was visible through her baggy black sweater.
Kournikova and Iglesias, 50, have three kids already - twins Lucy and Nicholas, 7, and another girl, five-year-old Mary.
Former tennis star Anna Kournikova was spotted displaying her blossoming baby bump in MIami on Tuesday
The Russian former world no 8 is expecting her fourth child with her partner Spanish singer Enrique Iglesias
News of the tennis star's pregnancy comes just months after pictures of her in a wheelchair sparked concern amongst fans of the sport.
Kournikova was pictured being pushed by her daughter at Miami's Bal Harbour shopping centre back in January while also wearing a protective boot over her foot.
It's however thought the 44-year-old suffered a foot injury and may have undergone surgery around that time.
Iglesias has lived in the Miami area since the late 1990s with Kournikova joining the heartthrob after the couple shacked up.
Kournikova burst onto the scene in the tennis world when she turned professional at the age of 14.
She got as high as eighth in the world rankings but never won a Grand Slam singles title.
But in the doubles, she enjoyed greater success once she partnered up with Martinia Hingis. Together, they won the Australian Open doubles championship in 1999 and again in 2002.
She never officially confirmed that she had retired but her last game was in May 2003 when she was just 21 years old.
The Russian, once voted the world's sexiest woman, was pictured stepping out with her son to do some grocery shopping in Miami this week
Wearing a casual all-black outfit and a pair of matching sunglasses, Kournikova's bump was visible through her baggy black sweater
Kournikova struggled badly with injuries during her tennis career and quit the game at age 21
Kournikova's rise was blighted by stress fractures in her back and feet - her foot injuries meant that there was extra concern when she was pictured in a protective boot earlier this year, considering her history.
In an interview with The Guardian the year that she retired, she opened up on the pain she had fought through because of tennis.
'I will only play the game for as long as I'm having fun. It is important to realise that tennis is not the only thing that matters in life,' she said.
'Basically, I've had an injury nearly every single year. In '97 I had a stress fracture and was out for three months; in '98 I had a torn ligament in my thumb and was out for three months; in '99 I had another stress fracture for three months; and then in 2001 I didn't basically play the whole year.'
Kournikova also enjoyed the spotlight away from the court, garnering fame as a model. In 2002, she was voted the world's sexiest woman, beating the likes of Britney Spears and Jennifer Lopez, and was also acknowledged as the sexiest female tennis player of all time in 2010.