Judy Murray has revealed she has to get through to the next week of Strictly Come Dancing - because her son Andy can come to cheer her on from the audience.

The tennis coach has been getting low scores and poor comments from the judges the last few weeks and is currently the favourite to get the boot, with bookmaker William Hill giving her odds of 6/4 to go.

But she revealed that tennis champ sons Jamie and Andy have promised to come to watch her if she can stay in one more round.

Judy said: "I have a big incentive to try and stay in this week because they've both said I have to stay in one more week and then they will, hopefully, have finished their commitments in Europe and be able to come and watch next weekend.

"So that's a big incentive for me to try and perform well and not look like I've got rigor mortis this week!"

But the 55-year-old sportswoman admitted she is struggling to master the tango, because every time she tries to look passionately into professional partner Anton Du Beke's eyes, she bursts out laughing.

Judy confessed: "I get the giggles. That's the strange thing, because we have such a good laugh, he's upbeat all day long and he's great fun, he's got such a good sense of humour. And when he's coming towards me and very close, I just dissolve into giggles, which is absolutely not what you are supposed to do."

So the tennis coach is going to try and recall the stress of watching Andy Murray competing in the Wimbledon Final to stop herself laughing.

She revealed: "I'm normally quite good at doing a poker face when I'm watching the boys playing tennis. So I think that's what I have to channel - imagine that I'm in that same sort of stressful situation and nothing is going to make me smile at all!"

And Judy is not bothered about being the bookies favourite to leave the show.

She said: "I went into this because I love the show and to have fun, a once in a lifetime experience to do something completely different - learn to dance.

"I still keep having to pinch myself that I'm getting private dancing lessons every week from the one and only Anton Du Beke.

"For me, if I can keep improving a little bit every week, that's good enough for me."