Demba Ba has become the latest Chelsea player to withdraw from international through injury and, like Petr Cech, could be a doubt for Saturday's Barclays Premier League clash with Wigan.
The Senegal striker suffered a broken nose in last Saturday's loss at his former club Newcastle and his withdrawal follows that of Czech Republic goalkeeper Cech, who has a finger injury.
Chelsea statement: "The Senegal Football Federation have announced that Demba Ba has withdrawn from the squad ahead of their game against Guinea, after suffering a broken nose during Saturday's 3-2 defeat against Newcastle United."