Ulster may be without injured half-backs Christian Lealiifano and John Cooney, and prop Wiehhan Herbst, for Saturday's Pro14 derby against Leinster.
Leinster out-half Johnny Sexton has spoken of his Ireland team-mate Simon Zebo's decision to leave Munster for Racing 92, branding it as a "sacrifice".
Former Ireland lock Donncha O'Callaghan has announced that will retire at the end of the season.
Munster and the Irish Rugby Football Union [IRFU] have confirmed that Simon Zebo will leave the province at the end of the season.
Munster and Ireland hooker Niall Scannell is facing an extended spell on the sidelines after undergoing surgery on a thumb injury...