Show and go from Buttin but obstruction give Leinster the penalty, Byrne finds touch

Some good carries see Arnold take it into the 22

Dumortier crashes it up in midfield

No try, McGrath was in front of the kicker, back for a Lyon penalty and Buttin sets up the lineout

TMO will check if McGrath was in front of the kicker

What a start for Leinster as they attack the short side with van der Flier flying down the right, he plays it outside and Leinster chip ahead with McGrath winning the race to gather and score

Box kick from Pelissie onto Larmour

Byrne gets the match underway

Leinster host Lyon in round 5 of the Champions Cup. Leinster remain unbeaten with four wins from four and are already ensured progression to the knock out rounds, while Lyon has recorded just a single victory from four matches to lie third in the pool. When the sides met back in round 2 Leinster edged Lyon 13-6 away from home.