As Roger Federer was battling it out on court in his five-set victory against Stanislas Wawrinka on Thursday night, those watching at home were more concerned with his wife’s choice of attire.

Mirka Federer, who has been married to the Swiss champion for eight years, wore a particularly eye-catching hot pink jumper to support her husband from the sidelines.

Mirka Federer’s designer sweater divided opinion. Photo: Getty

The jumper, from Italian luxury brand Gucci, was a controversial sartorial choice, prompting many fans on social media to ask, “What the %*$# is Mirka wearing?”.

One Twitter user even described it as “Eurotrash”.

But on a side note, does anyone know what's going on with Mirka Federer's sweater? #AusOpen

— komal randhawa. (@kkrandhawa) January 26, 2017

What is Mirka Federer wearing? #AusOpen #worstsweater #why #isshedrunk

— Cade Ringin (@CRingin) January 26, 2017

https://twitter.com/lethalgold/status/824581137880133632

Others loved the bright style statement, which bore the French phrase, “L’Aveugle par Amour,” meaning “Blinded by Love”.

https://twitter.com/_miriamfrei_/status/824645989915037696

If you read the message on #MirkaSweater you'll discover the most beatiful message on a tennis court ever. #francais #strategy @mirkafederer pic.twitter.com/ny0DvJ5nTb

— Yacine Azzouz (@_yacineazzouz) January 26, 2017

Unfortunately for fans of the sweater, it’s no longer on sale on Gucci’s official site, but a different variation – featuring a cat instead of a tiger – can be scooped up for a cool $AU1670.

You can score a slightly different version of the jumper if you have a spare $1670.

Mrs Federer isn’t the first celebrity to wear the candy-coloured clothing item.

Beyonce has also been photographed in the jumper and PR maven Roxy Jacenko sported the cat version during her husband Oliver Curtis’s insider trading trial.