Scotland coach Steve Clarke says Chelsea teen Billy Gilmour will only be called up on merit.

Gilmour's performances in wins against Liverpool and Everton in March led to calls for his inclusion in Scotland's senior squad but Clarke is willing to bide his time on the 19-year-old.

"Listen, Billy is a big prospect and will be a big player for Scotland in the future," said former Chelsea defender and coach Clarke.

"Whether the future is in September, or October or November, or whether it's a year it's going to be decided by Billy's performances [and] how he plays if he gets a chance to play.

"It's a position where we are very strong - we have a really good group of midfield players - so it's great to have that competition in that position.

"In an international environment, you don't always get what you want which is two top players for every position. Billy is certainly in the mix."