Didier Drogba is set to hand Chelsea boss Andre Villas-Boas a new dilemma.

The Daily Mail says Drogba is set to deepen Chelsea's problems by declaring himself unavailable for Sunday's FA Cup tie against Portsmouth.

Andre Villas-Boas originally hoped to have Drogba in his squad before the Ivory Coast striker left for the Africa Cup of Nations in Gabon and Equatorial Guinea because of a growing injury list.

But the striker, who missed Monday's win at Wolves with a minor foot injury, plans to report for international duty on Sunday, as requested by Ivory Coast boss Francois Zahoui.