Leinster number eight Jordi Murphy admitted his side were made to work for their 19-6 victory over Ulster on Saturday.
Man of the match Murphy, filling in for Jamie Heaslip, impressed with his powerful ball-carrying, bagging the game's only try, and ensuring Leinster were left seven points behind PRO12 leaders Munster.
But the number eight knows his side were part of a fierce contest, especially at the breakdown.
"We went in at half time and we knew it was just one or two little things we had to tweak," said Murphy.
"I thought we got better in the second half. I know we didn't score any tries, but I thought we were a bit more clinical overall.
"They were niggling at our ball a bit, winning penalties off us when we were deep in their 22, stuff like that. We just decided to put more pressure on, not leaving the rucks so bare, and we got what we wanted from it."