The fitness problem sustained in Wednesday's round of 16 first-leg defeat at the Stade Velodrome in France is not as serious as initially feared according the the club
The Brazilian defender did not to return to the pitch after the interval and there were fears that he faced a lengthy lay-off.
However, a scan on Thursday afternoon at the Fondazione IRCCS Policlinico San Matteo in Pavia revealed only a tendon strain in Maicon's right knee.
Inter have not indicated how long Maicon will be out for, but the feeling in Italy is that the player will miss between two to three weeks of action.
The 30-year-old will likely miss Inter's upcoming Serie A matches against Napoli, Catania and Chievo, and his involvement in the Champions League round of 16 return leg against Marseille is in serious doubt.