Monaco • Barcelona will again face seven-time winner AC Milan in the Champions League, and Bayern Munich is in a group that includes Manchester City.
Thursday's draw put Barcelona in Group H with Milan, Ajax and Celtic. Barcelona and Milan were grouped in 2011-12 and then met in the quarterfinals. They faced each other in the round of 16 last season.
Bayern, which beat Borussia Dortmund 2-1 in last year's final at Wembley Stadium, is in Group D along with Man City, CSKA Moscow and Viktoria Plzen.
Dortmund is in one of the toughest groups of the tournament alongside Arsenal, Marseille and Napoli.
The first group games take place Sept. 17 and 18.