Scotland and Glasgow Warriors fly-half Adam Hastings has been suspended for three weeks following his red-card incident in the recently concluded Pro14 game against Leinster.
Ulster know they cannot afford to lose this weekend against Leinster if they want to keep their Pro14 title hopes alive.
Munster lock Billy Holland has confirmed his retirement from professional rugby at the end of the ongoing 2020/21 season.
Leinster have inched closer to securing a berth in the Pro14 final as they defeated 14-man Glasgow in their latest Pro14 clash at Aviva Stadium.
Ulster overcame a poor start as they went on to defeat Ospreys 21-7 in the latest Pro14 encounter at Kingspan Stadium on Friday.
Munster scored two second half tries as they defeated Cardiff Blues 20-11 in their Pro14 clash at Cardiff Arms Park on Friday.