Luanda: Ghana captain Michael Essien suffered a knee injury during training at the African Nations Cup on Sunday, a spokesman for the Black Stars said.
The Chelsea midfielder, who has played just 45 minutes at the tournament in Angola, is doubtful for Tuesday`s key Group B match against Burkina Faso in Luanda.
"He picked up a knock in training and was taken to the hospital for checks," Ghana spokesman Randy Abbey told reporters.
"He has been released from the hospital to join his team mates. He is now resting at the hotel. We don`t know the extent of the injury."
Essien arrived almost a week after his team at the event, after being given time to recover from a hamstring injury at his London club. His arrival was also held up by flight cancellations because of bad weather in Europe.
Ghana must win their match against Burkina Faso to qualify for the quarter-finals.