Manchester United will face a reunion with Cristiano Ronaldo after drawing Serie A champions Juventus in the Champions League group stage.
Ronaldo, who was at United between 2003 and 2009, joined Juve for £99.2m in July after nine years at Real Madrid.
Valencia and Young Boys are the other teams in Group H.
Tottenham have been drawn in a tough group to face Barcelona, while last season’s runners-up Liverpool face Paris St-Germain and Napoli.
Eredivisie champions PSV Eindhoven and Inter Milan complete the line-up in Spurs’ Group B and Red Star Belgrade are the other team to play Jurgen Klopp’s side in Group C.
Premier League champions Manchester City were drawn in Group F alongside Shakhtar Donetsk, Lyon and Hoffenheim.
Last season’s winners Real Madrid, who have won the competition for the past three years, are in Group G with Roma, CSKA Moscow and Viktoria Plzen.
Full Draw:
Group A: Atletico Madrid, Dortmund, Monaco, Club Brugge
Group B: Barcelona, TOTTENHAM, PSV, Inter Milan
Group C: PSG, Napoli, LIVERPOOL, Red Star Belgrade
Group D: Lokomotiv Moscow, Porto, Schalke, Galatasararay
Group E: Bayern Munich, Benfica, Ajax, AEK Athens
Group F: MAN CITY, Shakhtar, Lyon, Hoffenheim
Group G: Real Madrid, Roma, CSKA Moscow, Viktoria Plzen
Group H: Juventus, MAN UTD, Valencia, Young Boys
