The striker suffered a broken nose during Saturday's 3-2 defeat to Newcastle and could now be forced to miss the Blues’ upcoming meeting with Wigan at Stamford Bridge
The 27-year-old was forced off in the first half of the Blues' 3-2 defeat against his former side Newcastle on Saturday after suffering a broken nose.
The injury occurred when the forward collided with his ex-team-mate Fabricio Coloccini's boot while attempting to win a header as Chelsea trailed 1-0.
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Ba has netted three goals in nine appearances since joining the Blues in January and Chelsea interim manager Rafael Benitez has Fernando Torres as his only other striking option.
The Blues have a number of injury doubts heading in to their match against the struggling Latics - with defensive duo Petr Cech and David Luiz both in a race to be fit.