Rory McIlroy wants new measures to combat slow play

Rory McIlroy has called for slow players to receive a solitary warning before receiving shot penalties.

The issue of slow play came to the fore again during the final round of the Open Championship at Royal Portrush, where world number one Brooks Koepka tapped his wrist in the direction of officials to signal his displeasure with the time taken by playing partner JB Holmes.