The Dragons looked to be cruising home after establishing a 34-4 lead at the start of the second half but they allowed Super League's bottom side to battle their way back and in the end the French side will feel relieved to have escaped with a 34-28 win.
Frayssinous was far from impressed with his team's display during the closing stages and admits they have plenty to improve on ahead of next week's Challenge Cup quarter-final against Hull. "I was pleased with the first 50 minutes but I'm very disappointed with the last 30," he said.
"We have spoken about the performance and not the two points tonight, it is not that we haven't won by 30 or 40 points, it is that we were not clinical with the ball. We have got a lot of work to do."
Frayssinous was able to take a few pluses from the win, though, which leaves the French team in fifth spot in the Super League standings on 24 points.
"At the end of the day, we managed to get the two points and they are now two points we don't have to chase at the end of the season, and we managed to rest a few players," he said.
"We wanted to put in a performance to build towards winning next weekend. We have spoken about big games since last November, now we have a big game next weekend so we can see where we are at."
In contrast to Frayssinous, London coach Tony Rea was full of praise for his team's second-half fightback in sweltering conditions - although he concedes they need to start showing that level of performance earlier in games.
The Broncos also staged an impressive recovery last weekend after trailing 34-6 at half-time to Salford, only to fall short once again in a 44-30 defeat.
"We probably need to start our comebacks a little earlier after the last two weeks. We've scored 24 (second-half) points in the last two weeks and we need to start games with that sort of intensity," Rea said.
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