Former world No 1 Victoria Azarenka is thought to be in danger of missing the upcoming US Open, because she is busy fighting a custody battle with Billy McKeague, her ex-boyfriend and the father of her eight-month-old son.

Azarenka's son, Leo, was born in December and accompanied her to Wimbledon, her second tournament after a 12-month absence from the tour, where she called for the scheduling of matches to be more sympathetic to parents with young children.

McKeague was also present in London and Azarenka told Telegraph Sport: "I have a nanny, but she is not here at the moment, so obviously my boyfriend has been helping out.

"He loves being a dad and spending time with Leo. It's fun."

However, it is understood that Azarenka and McKeague broke up shortly after Wimbledon, and have spent the last few weeks engaged in a legal custody case in California, where she has a home.

Advertisement

The American website TMZ has reported that Azarenka has been told she cannot take Leo out of California, until the case is resolved.

Azarenka, whose representatives declined to respond to messages yesterday, had been entered into the Bank of the West Classic in Stanford, California last week, but she withdrew from the event a fortnight ago, citing a viral illness.

She was also due to play Cincinnati next week, having requested a wild card into the main draw. Her ranking of No 203 is not high enough to gain entry, but it would now be a surprise if she attended the event.

Azarenka, a two-time Australian Open champion, is still being quoted as third favourite for the US Open by some bookmakers, behind current world No 1 Karolina Pliskova and new Wimbledon champion Garbine Muguruza.

But the year's final Grand Slam, which starts on August 28, is now just more than a fortnight away and it seems that she has more pressing concerns to address.

- Daily Telegraph