Charles Piutau's try close to the final whistle wasn't enough in the face of 22 points from the home side
It was a bad day for Ulster as they lost 22-7 to Leinster at the RDS Arena.
A late Charles Piutau try wasn't enough for the visitors to win, but they denied their opponents fourth try for a bonus point.
Ruan Pienaar missed some early penalty-scoring opportunities with the boot.
Rory O'Loughlin scored two tries, including one in the 6th minute of the game.
Luke McGrath also got over the line, and Ulster weren't able to bounce back from a 17-0 deficit at half time.
Speaking after the match, Director of Rugby Les Kiss says the little mistakes added up.