Leo Cullen has revealed that Leinster will not be appealing James Lowe's two-week ban and admitted the province will have to be "more composed" this week after an undisciplined display against Munster.
Lowe was sent off for a tackle in the air on Andrew Conway while Cian Healy and Tadhg Furlong were also sin-binned during the tempestuous first half of the defeat at Thomond Park.
"We won’t be appealing the ban at this stage anyway," Cullen said. "All our players need to be aware of the sanctions and the way these incidents are being refereed and dealt with after the game.
"There are a lot of bits going on in that game. The Munster nine is pushing him off his line, so he starts pushing in field, and the catcher is coming in late and suddenly James is in the landing zone with the Munster player. We’ve to deal with the consequences.
"It is a difficult area for the players, I don’t think there is intent but it is difficult for players. It is good to see Andrew Conway is playing this weekend. Players need to be aware, like (with) high tackles."
Cullen suggested both teams had been "pushing boundaries" in Limerick but accepted that things would have to improve for the visit of Ulster to the RDS tomorrow.
"We got caught badly last weekend with three different incidents, it hasn’t been a trend for us but we need to be aware of that.
"If you look at the penalty count it was 14-13. It was a very competitive game, maybe players from both sides trying too hard and pushing boundaries.
"It hasn’t been a major issue for us this year but there were areas we weren’t happy with, how we control game, particularly early so we’re not getting ourselves in that situation and we need to be calmer and composed in terms of starting games.
"But we’ve trained well this week and have had better preparation."
Rob Kearney has recovered from a dead leg and will captain Leinster against Ulster.
Noel Reid is the only player retained from the Munster encounter and Cullen has named his third outhalf in as many games in Ciarán Frawley.
For the Leinster boss, rotation is key if they are to mount a credible defence of their Pro14 and Champions Cup titles.
"We've come off two big European games. The three interpros, it's very much for us about giving everyone in the group an opportunity to play," he said.
"Across the selections over the three games we've started a different person each of those weeks and mixed and matched a bit on the bench as well.
"Ross (Byrne) started against Connacht, Johnny (Sexton) started last week and Ciarán starts tomorrow.
"It gives those guys an opportunity. It's important over the course of the 21 Pro14 games that we
are able to try and build depth.
"We want to stay alive in two competitions. To do that, you need to use your squad, you can't rely on the same XV to get you through the season."
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