Vanishing spray will be used to mark free-kick walls in Champions League and Europa League games next season, subject to a successful trial.

It will be tested at the European Under-17 Championship in May, and then implemented if there are no issues.

The spray aims to stop players encroaching beyond the 10-yard gap for free-kicks, and it has been widely used in South American football.

The 2011 Copa America was the first major international tournament in which was administered.