France boss Laurent Blanc has hinted English-based duo Laurent Koscielny and Gael Clichy could face England on Monday.
England take on France in their Group D opener at Euro 2012 not knowing who is going to feature in a French defence that has come in for criticism in recent weeks.
Philippe Mexes and Manchester United's Patrice Evra are the more experienced options at centre-back and left-back respectively but have failed to nail down their starting places.
And Blanc was full of praise for Manchester City full-back Clichy and Arsenal centre-half Koscielny ahead of the clash with England.
Blanc said: "There was hierarchy in place which all changed when Eric Abidal became ill. We have to redesign the left side of the defence in the absence of Abidal.
"Clichy can bring us what he did in the second part of the season with City. He was up against [Aleksandar] Kolarov [at City] and managed to come out on top.
"Going forward, he brings a lot to the team, but he still has to work on the defensive side of his game.
"That's the case with most modern full-backs, including Evra - they're better going forward than defending.
"Koscielny had a good game against Serbia, that's good for him. I don't have any guarantees in defence, I haven't told my players anything yet."
Roy Hodgson may have a better idea about the France team he will face after Blanc picks his side for their final warm-up game against Estonia on Tuesday night.
"The match should help us improve our fitness in order to be ready for June 11," Blanc added.