The WBC heavyweight champion suffered a 'partial tear' of ligaments in his left shoulder as early as the fourth round of the fight, causing him to throw the left less frequently.
But while no surgery is necessary it will be six to eight weeks before the 40 year old can start training again, ruling out a return to the ring this summer.
And having beaten most of the credible challengers out there and with a clash with David Haye seemingly dead in the water, the veteran could decide that now is the time to walk away.
Klitschko (44-2) is unbeaten in 12 fights since losing on cuts to Lennox Lewis in 2003, during which time he had a four-year hiatus due to back and knee injuries.
His only other defeat came in 2000 when he was forced to retire with a shoulder injury against then-WBO champion Chris Byrd when ahead on the scorecards.