Ulster's Muller keen to finish on a high

Johann Muller says Ulster know they have to beat Leinster on Friday night to keep alive their hopes of winning the Pro12 title.

Ulster are currently fourth in the standings and cannot afford any slips as they chase a spot in the end-of-season play-offs.

Muller retires at the end of the season and says Ulster have found a good replacement in Franco van der Merwe.