EUROPEAN Tour chief executive Keith Pelley is upbeat about the prospect of golf resuming sometime in the summer.

But the fourth edition of tennis' Laver Cup has been moved back 12 months to September 2021.

The European Tour announced the cancellation of the BMW International Open in Munich and the Open de France near Paris while the Scottish Open, due to be held at North Berwick from July 9-12, has been postponed.

With the calendar in Europe now cleared until at least July 30, the scheduled start of the British Masters, Pelley is hopeful the coronavirus crisis will ease in the intervening months to allow for no more interruptions.

He said: "My primary message is actually one of optimism because I am genuinely hopeful that from now on the information I send in relation to our 2020 schedule will be positive.

"We cannot emphatically commit to a start date because, as I have said many times, we will not resume until it is safe, and we are permitted to do so. We now have 14 weeks with no tournaments, but those three and a half months are also the time where the global situation may well begin to show signs of improvement.

"There are already discussions centring around the easing of restrictions in several countries and everyone is optimistic that these can continue.

"This window also gives us the opportunity to continue working behind the scenes on a variety of scheduling options which would allow us to provide you with a busy calendar of golf to enjoy when we do resume."

The Laver Cup, meanwhile, will not take place this year because of scheduling issues thrown up by the COVID-19 outbreak.

Organisers have closely monitored the tennis landscape with their partners since the French Open announced it would move to be held from September 20 to October 4, 2020, which would see Roland Garros clash with the sold-out Laver Cup.

The men's hard court tournament, which pits six top European players against six from the rest of the world, will instead be hosted at TD Garden in Boston from September 24-26, 2021.

Organisers said there was "no reason to delay the inevitable decision".