Murray's fiancee Sears lets the F-bombs rip

Andy Murray's future wife has been accused of coming out swinging just as hard as the Scotsman in his Aussie Open semi against Tomas Berdych after appearing to unleash on the Czech player with a foul-mouthed outburst.

Whilst Murray is renowned for dropping F-bombs during tense matches, his fiancée Kim Sears is usually more reserved.

That appeared to change at Melbourne Park, last night, when the 27-year-old was caught on camera seemingly spraying Berdych as Murray fought back from a set down to advance to his fourth Australian Open final.

Her outburst immediately lit-up social media and has since been analysed by some of the world's best lip-readers who agree she let rip with some colourful language.

Tina Lannin, professional lip reader and director of communication company 121 Captions, told Britain's The Telegraph:

"F------ have that you flashy Czech, you flashy f---. If that's what you get..."

Her colleague James Freestone saw the word "c---" instead of "get".

Martine Monksfield, lip reader and teacher, said:

"F------ have that Czech you fat old f---."

The angst-filled match was fuelled by death stares from Berdych and the Scot's often-angry remonstrations.

They had shared history in that Berdych hired Murray's former coach and confidant Dani Vallverdu in December after a falling-out with the Scot.

Berdych didn't miss when he struck a volley directly at Murray in the fourth set, but by then his efforts were in vain.

The Scot admitted afterwards that the night began with extra spice.

"I changed tactics a little bit and I felt more comfortable with Tomas's ball," he said. "In the second set I got a lot more aggressive. "When I was dictating the points and getting the first strike I was winning the majority of those points.

"I was able to do that more and more."

He also said he'd been told about his fiancee's apparent "Anglo-Saxon" outburst.

"When there's a lot of tension surrounding something, which you created, then it's completely normal that, yeah, the whole first set everyone was tight. Yeah, in the heat of the moment you can say stuff that you regret."

While Murray acknowledged the extra tension in the air, Berdych claimed he was oblivious to it, even after tensions threatened to boil over when Murray complained to the chair umpire that Berdych had addressed him during a set break.

The seventh seed revealed his words were simply "Come on Tomas", while an extended glare at Murray after losing a service game was just "the sport".

"I mean, where should I look?" he said.

"There is no really big deal about anything what was happening today on the court.

"It was a great battle... unfortunately with a bad end for me."

The sixth-seeded Scot came back from a set down to beat Berdych 6-7 (6-8) 6-0 6-3 7-5 in three hours and 26 minutes.