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Tennis star Andy Murray announced his support for Scotland's independence campaign, on the day that voters will decide the country's future. Elsa/Getty Images

Scottish tennis player Andy Murray has come out in support of the campaign for Scottish independence, on the day that voters go to the polls to decide whether the country will leave the United Kingdom.

Murray tweeted:

“Let's do this,” is a reference to a letter, sent by Scotland's First Minister and 'Yes' campaign leader Alex Salmond, to voters urging them to vote for independence.

Murray is one of Scotland's most high profile public figures. He has been the British No. 1-ranked tennis player since 2006, and in 2013 won the Wimbeldon men's singles title.

Reaction to Murray's stance was decidedly mixed on social media, with critics pointing out that Murray no longer lives in Scotland, but in Surrey, England. Surrey is part of the largely conservative-voting English home counties. All of the county's 11 members of the Westminster parliament are from the governing Conservative Party. Scotland has historically been more supportive of the left-leaning Labor party.

However, Murray also received encouragement from 'Yes' supporters.

As a resident of England, Murray would not be eligible to vote in the referendum, despite being Scottish.