• Striker to join Ivory Coast for Africa Cup of Nations• Manchester City and Arsenal hope to keep players laterDidier Drogba will not play in Chelsea's FA Cup third-round tie against Portsmouth at Stamford Bridge on Sunday, having agreed to answer Ivory Coast's call for him to join up beforehand for the Africa Cup of Nations preparations.André Villas-Boas, the Chelsea manager, indicated after his team's 2-1 win at Wolverhampton Wanderers on Monday, in which Drogba did not feature because of a minor foot injury, that he feared the striker would not be available against Portsmouth, although he promised the club would "try our hardest" to r...