Connacht were the only Irish team not to win on the opening weekend
The Pro 12 season started last weekend, with all four Irish provinces in action.
On Friday night, there were home wins for Leinster and Ulster against Benetton Treviso and Newport Gwent Dragons respectively. On Saturday, Munster won in Wales against Scarlets while champions Connacht lost at home to Glasgow Warriors.
Leinster 20-8 Benetton Treviso
Ulster 29-8 Newport Gwent Dragons
Scarlets 13-23 Munster
Connacht 5-41 Glasgow Warriors
Munster and Connacht are at home this weekend in Round 2 against Cardiff Blues and Ospreys respectively. Leinster travel to table-toppers Glasgow Warriors while Ulster head to Italy to play Benetton Treviso.