Don't give up your day job Andy Murray

PUT a microphone in front of Andy Murray and it usually doesn't make for thrilling listening but it appears the dour Scot has finally snapped.

FED UP: Andy Murray voices his opnions on signing autographs on the Bryans' song (Getty Images)

Murray is most at home talking plenty enough without saying much with microphone in face, but he has now turned to the medium of rap to get things off his chest.

He makes a cameo appearance on Autograph, a new release from US Doubles players Bob and Mike Bryan.

And to be quite honest, it's as bad as it sounds.

If you unravel the plentiful layers, nuisances and surreptitious symbolism within the lyrics, you can deduce that it's a ditty about disliking having to sign autographs.

As Murray puts it, "during Wimbledon it really gets crazy, my hand cramps up and my mind gets hazy."

Andy '50 Cent' Murray is not the only cameo performer. Novak Djokovic really gets into the swing of things although he flirts with dangerous ground.

In his gruff Serbian tones he remarks, "the fans start flocking......'

But his o's and u's sound one and the same and you really have to strain your ears to here the l sound. For a moment you wonder if this song is going off on another tangent altogether.

But while Murray and Djokovic are somewhat amateur performers, the Bryans have clearly done this before.

They pose the very salient question, what is the point of having an autograph.

"Take it to the beach or use it at the zoo?" they ask, presumably a rhetorical question. I think the penguins will be more interested in their fish rather than Murray's scribbling.

And to round things off, Murray takes the mic again.

"I sign and sign but the line doesn't end," he raps, in a manner associated with grandfathers on Boxing Day. "Wake me tomorrow let's do it again."

Please don't ever do this again Andy.