By Xinhua
London : Following are the results of the group matches in UEFA Champions League football Tuesday:
Group A:
Porto 1-1 Liverpool
Olympique Marseille 2-0 Besiktas
Group B:
Chelsea 1-1 Rosenborg Trondheim
Schalke 04 0-1 Valencia
Group C:
Real Madrid 2-1 Werder Bremen
Olympiakos Piraeus 1-1 Lazio
Group D:
AC Milan 2-1 Benfica
Shakhtar Donetsk 2-0 Celtic