Wednesday's UEFA Champions League features a marquee clash between Bayern Munich and Manchester United among eight exciting matches.
The Champions League returned on Tuesday with notable victories for Manchester City, Barcelona, and Paris Saint-Germain.
Key Matches for Wednesday is shown on next slides:
Bayern Munich vs. Manchester United•Where: Allianz Arena, Munich•When: 19:00 GMT•Manchester United faces injury setbacks, and Bayern Munich aims to progress far in the competition.
Arsenal vs. PSV Eindhoven•Where: Emirates Stadium, London•When: 19:00 GMT•Arsenal returns to the Champions League after a six-year hiatus, while PSV has been in strong form domestically.
Real Madrid vs. Union Berlin
•Where: Santiago Bernabeu Stadium, Madrid•When: 16:45 GMT•Real Madrid faces tournament newcomers Union Berlin in their 27th consecutive group stage appearance.
Braga vs. Napoli
•Where: Braga Municipal Stadium, Braga•When: 19:00 GMT•Napoli had a stellar season in the group stage last year, while Braga seeks a better showing after a long absence from the Champions League.
Real Sociedad vs. Inter Milan•Where: Anoeta Stadium, San Sebastian•When: 19:00 GMT•Inter Milan enters the Champions League with momentum, but Real Sociedad aims to make an impact after a decade-long absence.
Inter's Hakan Calhanoglu is sidelined with a thigh injury.
Real Sociedad's last successful Champions League campaign was in the 2003-04 season.