MILAN - Inter were held 1-1 by Werder Bremen in Matchday 2 of the Champions League and are joined on top of Group B by Anorthosis Famagusta, who beat Panathinaikos 3-1 in Cyrpus.
Maicon gave Inter the lead on 13 minutes but Claudio Pizarro put the teams on level terms with a close-range goal 17 minutes after the restart.
The Nerazzurri dominated the closing stages, creating an array of chances to snatch a winner.
José Mourinho fielded his usual 4-3-3 formation for the visit of Schaaf's side, with Balotelli making his Champions League debut in attack with Ibrahimovic and Adriano. Muntari returned in midfield alongside Stankovic and Cambiasso, with Zanetti slotting in at left-back and Cordoba returning in the centre of defence.
Inter could have gone in front within 30 seconds when Adriano, who scored both of Inter's goals the last time these two teams met in Milan, hooked narrowly over from Ibrahimovic's cross. Muntari then saw his volley deflected behind for a corner before Maicon broke the deadlock, chipping Wiese after winning a rebound.
An injury to Materazzi forced Mourinho into an early change, with Burdisso coming on for the Italy international.
Stankovic missed from close range, Pizarro hit the post, and Rosenberg and Özil had chances as both teams went close before the end of an evenly balanced opening forty-five.
Werder made a strong start to the second half and equalised in the 62nd minute when Claudio Pizarro poked home Özil's cross from the right.
Mourinho threw on Quaresma for Stankovic, introducing Cruz for Adriano in the closing stages and the Nerazzurri produced chance after chance, with Maicon shaving the post from 25 yards and Julio Cruz forcing Wiese into a difficult save with his scything shot.
Werder could have grabbed a winning goal in the dying seconds when Pizarro blasted into the sidenetting after Julio Cesar parried away Naldo's free kick.
Inter 1-1 Werder Bremen (HT: 1-0)
Scorers: Maicon 13, Pizarro 62.
Inter (4-3-3): 12 Julio Cesar; 13 Maicon, 2 Cordoba, 23 Materazzi (16 Burdisso 20), 4 Zanetti; 5 Stankovic (77 Quaresma 72), 19 Cambiasso, 20 Muntari; 45 Balotelli, 8 Ibrahimovic, 10 Adriano (9 Cruz 78).
Subs not used: 1 Toldo, 14 Vieira, 33 Mancini, 36 Bolzoni.
Coach: José Mourinho.
Werder Bremen (4-3-1-2): 1 Wiese; 15 Prödl (8 Fritz 86), 29 Mertesacker, 4 Naldo, 3 Pasanen; 22 Frings, 6 Baumann, 11 Özil (20 Jensen 82); 10 Diego; 9 Rosenberg (14 Hunt 77), 24 Pizarro.
Subs not used: 33 Vander, 2 Boenisch, 7 Vranjes, 18 Sanogo.
Coach: Thomas Schaaf.
Referee: Lubos Michel (Slovakia).
Booked: Baumann 21, Diego 53, Stankovic 61, Frings 68, Jensen 83.