Ghana key striker Asamoah Gyan has been ruled out of action for three weeks which means he should be fit for this month’s Africa Cup of Nations.The UAE-based attacker suffered what looked like a serious injury on Friday just weeks before the start of the tournament in Gabon and Equatorial Guinea.The Al Ain striker has now been told he needs to rest to be able to fully recuperate by the time the tournament starts on 21 January.“The doctors have told me that I need to rest for about three weeks for me to be able to fully recover from the hamstring problem,” Gyan told MTNFootball.com exclusively.“I am feeling some pain in the thigh right now but I know in two days’ time the pain will subside for me to start my recovery process.“With this I am hopeful that I will be fully fit be the time the Africa Cup of Nations starts.”The in-form attacker was taken off during his side Al Ain’s 4-0 win over Emirates in the UAE top-flight game on Friday.Gyan put his side in the lead in the 6th minute after converting penalty before he suffered the injury.Ghana will start their camping in South Africa on 7 January in preparation for the tournament.Gyan was expected to join the squad the day camping opens but with this injury it is not known if he will be fit to arrive in time.