Dragons (0) 0
Jean-Philippe Grandclaude opens the scoring for Perpignan
Perpignan (10) 25
Tries: Grandclaude, Marty, Plante
Cons: Montgomery 2
Pens: Montgomery 2
Percy Montgomery came back to haunt Newport Gwent Dragons on his return to Rodney Parade as Perpignan secured a Heineken Cup quarter-final place.
The victory ensured the French side finished as runners-up in Pool One, behind London Irish.
Full-back Montgomery, who left Rodney Parade two years ago, kicked twice and converted tries from Jean-Philippe Grandclaude and Adrien Plante.
David Marty scored Perpignan's other try to see off the Dragons.
The warning signs were there from the start when Montgomery had a penalty after two minutes for an offside, although he dragged it wide.
But he got it right on eight minutes when the Dragons were again caught offside to put the visitors 3-0 up.
Perpignan applied the most of pressure, forcing the home side to camp in their own half, although both teams were guilty of poor handling and kicking.
The Dragons were hit by the loss of captain Colin Charvis to injury midway through the first half.
And the misery was to continue as Perpignan scored the opening try from their first real chance of the game.
Henry Tuilagi was twice denied at the line, before the ball was eventually released and Marty passed to Montgomery who flicked on to centre Jean-Philippe Grandclaude who was free to dive over.
Montgomery made it 10-0 with his conversion.
The Dragons started brighter in the second half, but their lack of discipline cost them again as Montgomery added another three points.
Phillip Dollman then wasted a chance for the Dragons to reduce the deficit with the best move of the game.
They won a rare line-out and Ceri Sweeney burst through and engaged in quick interplay with Gareth Wyatt only for Dollman to then spill over the line.
It spurred the Dragons on and they looked the more threatening of the two sides at that poinmt but couldn't finish in the final third.
They were punished late on after Joe Bearman's lazy pass was intercepted by Marty who was able to run from his own half to seal the win.
Dragons coach Paul Turner
"I'm pretty proud of the team in the second half but that decision I thought could have been a (sin) bin and then could have been a try for us.
"I've got to look at the video because I'm absolutely fuming with this. If the perception is that Perpignan should always win, then so be it but we have copped it a couple of times today.
"We tried to play in poor conditions but our re-building starts now.
"I have put a plan together for the (Dragons) board and that is to bring in a couple of quality players and keep developing our youth as we have been."
Perpignan full-back Percy Montgomery
"It is always difficult playing in the rain when the ball is slippery.
"You want a nice open game but you have to play to the conditions as well.
"So we tried to play it close, tight and boring, which is the way to get a result.
"It's my fourth game back so it is a big plus for me personally but for the team as well, we are just getting better and better each game."
Dragons: A. Thomas, Wyatt, Emerick, Dolman, Fussell, Sweeney, W. Evans, Black, Daly, R. Thomas, A. Jones, Sidoli, Bearman, Charvis, Owen.
Replacements: A. Williams for W. Evans (60), Gustafson for Black (67), Robinson for R. Thomas (45), Hall for Sidoli (67), L. Evans for Charvis (20).
Not Used: Crawford, Walker.
Perpignan: Montgomery, Manas, Marty, Grandclaude, Plante, N. Laharrague, Durand, Freshwater, Guirado, Mas, Alvarez, Hines, Vaki, Chouly, Tuilagi.
Replacements: Cusiter for Durand (40), Britz for Alvarez (60), Tonita for Vaki (70), Perez for Tuilagi (60).
Not Used: Tincu, Pulu, Martin-Aramburu.
Ref: R Debney (RFU).