The statement said that after the withdrawal is complete, the U.N. will have a chance to broker a cease-fire for Sarajevo, and later for all of Bosnia.
Wigan soon crafted a chance of their own after the lively Charles N'Zogbia escaped down the left, but from his pull-back Scott Dann flung himself in the way of Rodallega's shot.
Apart from N'Doye's rare chance for the visitors, an upset never appeared on the cards for a Chelsea side who have now lost only once at home in 26 Champions League games.