Ulster boost as quartet return

Ulster will be boosted by the return of some established players when they face Leinster in the second of the RaboDirect Pro12 semi-finals at the RDS on Saturday.

Hooker Rory Best (ankle), flankers Roger Wilson (thumb) and Robbie Diack (knee) along with lock Dan Tuohy (hand) have all been given the all clear while scrum-half Ruan Pienaar (shoulder) could join the quartet if he comes through the final work-out tomorrow.

However, Nick Williams will be out for the remainder of the season with a leg injury sustained in the shock win over Munster last weekend.