RIBEIRAO PRETO, Brazil (AP) — While France's free-flowing attack is working well at the World Cup, doubts remain over the true quality of its unproven defense.
The center half pairing of Mamadou Sakho and Rapahel Varane is largely untested as they have been playing together for little more than one year.
When Sakho limped off with a sore thigh against Switzerland last Friday, France looked unsettled and conceded two quick goals in a 5-2 win in Group E.
"It didn't ruin the win for us, but we know we have to concentrate until the end," Varane said.
Although France has all but secured its place in the next round, better opponents could expose what is a very raw back four.
France won the 1998 World Cup and the European Championship in 2000 with a defense featuring Lilian Thuram, Marcel Desailly, Laurent Blanc and Bixente Lizarazu — widely considered the best in the world.
They had played together for years, whereas the current defense cruelly lacks such experience, with the exception of 33-year-old left back Patrice Evra.
The 21-year-old Varane has eight international appearances — five of them starting with Sakho.
When Sakho came off, Laurent Koscielny replaced him and France conceded twice in the last 10 minutes.
Varane has started just once alongside Koscielny in a 1-0 defeat against Spain in a World Cup qualifier in March last year, while France's fourth-choice center half Eliaquim Mangala has only made three international appearances.
The vulnerability of the defense is further underlined by doubts over Varane's right knee and Koscielny's temperament.
Varane, who had surgery at the end of the 2012-13 season, did well in the Champions League final win against Atletico Madrid a month ago but played only 14 league games last season.
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