How many mothers across the land have speculated about the pleasures of dancing with Artem Chigvintsev, the muscled Russian star of Strictly Come Dancing?

And how often have their children retorted wearily: "You'd be terrible, mum."

This was Andy Murray's response to suggestions his mother Judy was to feature in the new series, she recently revealed.

Judy Murray has now been confirmed as a contestant in this year's Strictly although, sadly for her, Artem will not be in the BBC show this time round.

While the tennis coach and mother to stars Andy and Jamie may well charm viewers who have been misled by her public profile, it is not clear how well she will fare on the floor.

She describes herself as an armchair dancer. At best, this suggests the dancers of Glasgow's Commonwealth Games opening ceremony, who wielded their chairs to striking effect. But it also conjures up visions of broken bones after accidental missteps on the furniture.

Either way, if the demanding Judy Murray responds well to being on the other end of coaching, we are sure - even if Andy isn't - that she will be a smash.