The couple met in 2005 through tennis circles - her father Nigel is a coach and former head of women's tennis at the Lawn Tennis Association.

They moved in together in 2008 and briefly split the following year before rekindling their relationship.

They were married in Murray's home town of Dunblane last April and announced the pregnancy in the summer.

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Kim's pregnancy was confirmed publicly in August after they had told family and friends the news, following the 12-week scan.