Ulster trail Llanelli 20-9 in the Celtic League tonight but Leinster narrowly trail Newport Gwent Dragons 39-35.
Elsewhere Munster lead the Borders while Connacht went down to the Warriors.
Celtic League latest:
Leinster 35 Newport Gwent Dragons 39
Llanelli 23 Ulster 9
Borders 10 Munster 18
Glasgow 31 Ospreys 17
Connacht 3 Celtic Warriors 20.