كتب : Omar AbdelAziz
Brazil full-back Maicon put the Nerazzurri in front with a sublime finish in the 11th minute as Jose Mourinho's side looked to be on their way to an easy win.
However, Claudio Pizarro's second-half strike secured a point for the Germans, who scored ten goals in their last two Bundesliga games.
The Peruvian was close to snatching a famous victory for Werder, but his late strike came inches wide.
In the other group game, outsiders Anorthosis Famagusta registered an impressive 3-1 victory over Greek champions Panathinaikos.
Jose Sarriegi (own goal), Sinisa DobraSinovic and Iraqi midfielder Hawar Mulla Mohamed clinched full points for the Cyprians, who share top spot with Inter on four points.