Group B
Inter Milan 2-2 Borussia Monchengladbach
Romelu Lukaku scored a brace, including a dramatic 91st-minute equaliser, to rescue a point for Inter Milan in a 2-2 draw with Borussia Monchengladbach.
Lukaku broke the deadlock in the 49th minute, but Ramy Bensebaini equalised from the penalty spot in the 63rd minute.
Jonas Hoffman gave the visitors the lead minutes from time. However, Lukaku popped up in stoppage time to salvage a share of the spoils for Antonio Conte's side.
The Nerrazzurri are now winless in their last three matches. Meanwhile, Lukaku has scored seven goals in six matches this season as he continues his red-hot form.
Group D
Midtjylland 0-4 Atalanta
Atalanta cruised to a 4-0 victory over Midtjylland in Denmark to move top of Group B.
Duvan Zapata, Alejandro Dario Gomez, Luis Fernando Muriel Fruto and Aleksei Miranchuk were on target for the Serie A outfit.
Group C
Olympiakos 1-0 Olympique Marseille
Ahmed Mahgoub scored in stoppage time to secure a last-gasp victory for Olympiacos over Marseille in Greece.
The win sees the Greek giants sit in second spot behind leaders Manchester City who defeated FC Porto 3-1.