Ulster's Paddy Wallace has been ruled out of action for three weeks after suffering a muscle tear in his leg.

He will miss their Pro 12 match against Munster at Ravenhill on Friday and also looks set to miss the Heineken Cup ties against Montpellier and the Leicester Tigers.

Wallace ruptured his anterior cruciate ligament in February and only returned to action in recent weeks.

Luke Marshall, Andrew Trimble, Darren Cave and Rob Herring are all expected to be fit for the Munster game.

Main image: Ulster's Paddy Wallace is tackled by Zebre's Alberto Chillon ©INPHO/Presseye/Darren Kidd