Johnny Sexton has admitted Leinster have no one to blame but themselves for their mauling at the hands of Wasps on Sunday and lamented: "For most of us it was the worst day we’ve had in a Leinster jersey."
Leo Cullen's side are facing a real battle to escape from their European Champions Cup pool after their 33-6 defeat to a clinical Wasps team at the RDS.
It was a disastrous opening European game for the hosts, and with a trip to Bath - as well as two daunting collisions with Toulon - on the horizon, Sexton has warned his team-mates they must step up to the plate.
“It’s one thing losing, it’s another thing losing at home… and by the margin that we did. You to park it in some ways but you have to learn from it as well," said Sexton, speaking on RTÉ 2fm's Game On.
"We weren’t good enough. We felt during the game that we were quite comfortable at times. We started really well into a strong breeze.
"To go in 16-6 down at half-time we felt was probably against the run of play because they didn’t have much pressure on us, but like I said parts of game weren’t good enough.
"We made too many errors - in that second half especially. For most of us it was the worst day we’ve had in a Leinster jersey."
"Other parts like winning 50-50s and winning the collisions – you can’t turn to a rugby match and not win them."
Sexton, back with the province after a two-year stint with Racing Metro, highlighted the players' struggles to adapt to a new style of playing, but also admitted that their failure to do the basics right was inexcusable.
"We’re trying to work with kind of a new structure at the moment and it’s a good structure to play in, but there’s parts of that structure that broke down badly at the weekend," the fly-half said.
"Part of it is guys being accountable for the ball and working hard to get back in position. Other parts like winning 50-50s and winning the collisions – you can’t turn to a rugby match and not win them.
“You’ve also got to give Wasps credit. They’ve got some excellent players. We were playing against a good team as well. We knew if we weren’t on our game we’d get punished and that’s what happened.
"It seemed that every time they got anywhere near our 22 they got points. We’ve got to just look at the game and see where we can get better."
Leinster travel to Bath next week and host defending champions Toulon in December, with Pro12 games against Ulster and Glasgow Warriors in between.