Erasmus hails 'unsung hero' Williams
Rassie Erasmus has praised Duncan Williams for stepping into the breach when Conor Murray failed to prove his fitness ahead of Saturday's victory over Toulouse.
Murray was ruled out on Friday, but the Corkman produced an assured display in the comprehensive win and got a standing ovation when he left the field with two minutes to go.
"He's a hell of an experienced guy and he is a guy that contributes a massive amount in the education sessions and team meetings - he is always speaking," Erasmus said.
"Maybe he's not in the perfect mould of a traditional scrum-half, but he's always fit.
"I think in six years he's never been not available, he's got a great kicking game and he makes unbelievable tackles. Two weeks ago he saved us from a certain try and today I think he's an unsung hero.
"Conor is a world class No. 9, but I think Duncan is one of the true Munster guys. He's been sitting on the bench, him and Tomás O'Leary, so I'm glad he got an opportunity in a quarter-final to show what he is worth."
Erasmus believes Murray is close to a return and should be fit for the semi-final against Saracens at the Aviva in three weeks.
He was also positive about the health of Peter O'Mahony (thigh), CJ Stander (ankle) and Keith Earls (back), who all came off injured on Saturday. Erasmus will provide a further update on the situation today.