The injury ruled him out of Ghana's international friendlies against Japan and Iceland to be played on May 30 and June 7th.
Christian Atsu had a stellar campaign with Newcastle United helping them finish 10 in the English Premier League after returning a season ago.
“I can assure you I will be better than last season for sure, and I believe when am playing the fans will see a big difference in me,” he said.
The 26 year old played 26 games and scored twice for the Toons.
Atsu joined Newcastle from Chelsea after spells with Everton, Bournemouth and Porto previously.