England skipper Chris Robshaw believes a lack of discipline played a huge role in his side's 25-20 loss to France in Paris on Saturday.
The visitors were under the cosh for most of this match and only two tries late in the second half, from Danny Cipriani and Jonathan Joseph, added some respectability to the score.
Robshaw identified his side's poor discipline in the first half when five Fred Michalak penalties gave les Bleus a 15-6 lead at half-time, as the cause of their downfall.
"First half we were shocking with our discipline," he said.
"We gave too many penalties away. We didn't react to the ref and it left us with a lot to do in the second half. Credit to everyone, I thought we came out on the second half and played well."
Robshaw said although his side fought back well, they can't afford to play like they did in the first half at the Rugby World Cup.
"There is a huge amount of potential there but you just can't give teams a head start like that," he added.
"By our standards it wasn't good enough."