Munster have another famous win in the Champions Cup.
They outlasted an onslaught from La Rochelle to come away with a 25-24 win in France.
Jack Crowley's late drop goal proved the difference between the sides in the end.
Earlier, Leinster eased into the quarter finals with a 62-0 win over Harlequins at Croke Park.
Ulster are looking to join Leinster and Munster in the next round of the Champions Cup this afternoon.
The Northern Province are in France to take on heavily fancied Bordeaux from 12:30pm.
In the European Challenge Cup Connacht won 35-20 at Cardiff.