Andy Murray becomes more British when he is winning and reverts to Scottish when he is loses, according to an opinion poll.

YouGov research found the Wimbledon champion, who is the favourite to win this year's competition, tends to be seen as Scottish when he is unsuccessful by the public.

Murray's hopes of Wimbledon success were helped this weekend as two-time defending champion Novak Djokovic crashed out of the tournament to American Sam Querrey.

YouGov polls have been tracking the public's view on Murray's nationality since his loss to Novak Djokovic at the Australian Open in 2011.

The research found for the majority of this period the public has tended to think of him as Scottish, however, the tendency to view him as British spikes at times when he is most successful.

The only time he has been seen as more British than Scottish was straight after he won Wimbledon in 2013, having started the tournament firmly being Scottish in the eyes of the public.

His second highest British score came following his success at the 2012 Olympics.

Following his declaration for the Scottish Independence Referendum's Yes campaign in 2014, his Scottishness shot up in the eyes of the public.

A YouGov spokesperson said: "Our latest poll shows there has been a slight swing back, although a majority of the public still think of him as Scottish.

"There is a little ambiguity on the issue north of the border however, with a full 79% of Scots seeing him as Scottish, and just 15% thinking of him as British."