Sir Andy Murray and his wife Kim are celebrating the birth of their first son.

Kim, 31, sparked pregnancy rumours in July after arriving at Wimbledon wearing a maternity top while cheering on her husband in a mixed doubles match with Serena Williams.

Now it has been reported that the couple have broken the news of their third child to loved ones.

Andy Murray's grandfather Roy Erskine, told The Scottish Sun: “It’s a wee boy, I don’t know his name yet. I’ve seen photos. I’m just glad it’s over. They’re doing fine.”

The two-time Wimbledon champion said last month he may need to rearrange his playing schedule depending on the timing of the new arrival.

Sir Andy and Kim are already parents to daughters Sophia, three, and Edie, who will turn two next month.

It's also reported that bokies are offering odds of 500-1 on Sir Andy's son also clinging the Wimbledon men's title one day.

The couple got married in Sir Andy's home town of Dunblane in 2015.