Calum MacRae has named three debutants in his side ahead of the HSBC World Rugby Sevens Series in Hong Kong this weekend.

Glasgow Warriors’ Grayson Hart, Edinburgh Rugby’s Blair Kinghorn and Scotland U20 back Darcy Graham will all feature on the Sevens circuit for the first time.

Scrum-half Hart, who has three Scotland caps, has played 32 times for the Warriors following a stint with Edinburgh Rugby and has Super Rugby experience playing in New Zealand and Australia.

Kinghorn (20)  has already played 35 times for his club and his sevens debut follows being capped for Scotland at U18 and U20 levels.

BT Sport Scottish Rugby Academy prospect Graham has been in fine form this season, playing every game for Scotland at the U20 6 Nations.

Earlier this year it was announced that his eye-catching performances had earned him a professional contract with Edinburgh Rugby ahead of the 2017/18 season.

Harlequins winger Robbie Nairn also joins the squad.

Scotland 7s Head Coach Calum MacRae said: “Having lost Scott Riddell to injury, it’s great to have Hugh Blake co-captaining the squad with Scott Wight.

“It is a chance for Hugh to show how much he has developed as a person and a leader.

“We have three new caps in Darcy Graham, Grayson Hart and Blair Kinghorn, all of whom understand the work ethic that is expected and required.

“This is a great opportunity as part of their development to put a marker down and show what they are about.”

Scotland will compete in Pool D of the Hong Kong event alongside USA, Argentina and Russia. They currently sit in 8th place in the HSBC World Series standings and will be hoping to recapture some of the form that led to impressive placings at earlier events in Cape Town and Wellington.