The plans include 30 new rooms, a spa, treatment rooms, staff accommodation, a 200-capacity conference and events area, and a gym designed by the world number one tennis star himself.

About 40 jobs are expected to be created at the hotel if the plans are approved.

Graeme Green, general manager at Cromlix, said: “Since we reopened in spring 2014, Cromlix has been a real success story, with both the hotel and Chez Roux restaurant far exceeding expectations and often operating at capacity.

“We are now hoping to build on this success by extending the existing buildings to create additional hotel bedrooms, banqueting facilities and staff accommodation as well as growing the team.”

The ten-bedroom Cromlix, which Murray bought for a reported £1.8 million in 2013, was named luxury Scottish hotel of the year in 2016.

The expansion of the Cromlix is expected that work can commence within the next year and be completed by 2020 if the proposals are approved.