He sprained an akle last Sunday and so joins a lengthening Munster injury list that includes Paul O'Connell and Anthony Horgan.

Munster have just two games to play - Connacht and Leinster - before the opening Heineken Cup game against Sale Sharks. O'Connell is set to miss that but Munster are optimisrtic that Horgan and Wallace will have recovered in time to be considered for selection.