Watch: All hell breaks loose as Andy Murray’s fiancee abuses his opposition camp

Melbourne: Andy Murray has defended his fiancee after she was caught on camera during his tense Australian Open semi-final win apparently swearing at the Tomas Berdych camp courtside.

Tension between Murray and Berdych spilled over off court with the Scot's wife-to-be Kim Sears caught up with the emotion of Thursday's match.

Murray, who beat the Czech seventh seed 6-7 (6/8), 6-0, 6-3, 7-5 to reach his fourth Australian Open final, attributed the atmosphere to the pre-match focus on his former coach, Dani Vallverdu, who is now working with Berdych.

Asked at his post-match media conference if he was aware of Sears being caught on camera, but with no audio, using some "Anglo-Saxon adjectives" directed at the Berdych camp, Murray said he was.

As per the reports in Daily Mail, Murray's longtime girlfriend and now fiancee, Kim Sears uttered, ''F***** have that you Czech flash f***'' towards Murray's semifinal opponent Tomas Berdych's fiancee.

The report further adds that a professional lip reader John Cassidy is of the opinion that Kim Sears uttered, “You little f***.”