Manchester City will clash with Real Madrid in the Champions League after being drawn together in Group D.

The two giants of European football will face each other head to head in the group stages, which kick off next month. They will also take on Ajax and Borussia Dortmund in the difficult group.

Real Madrid's Cristiano Ronaldo is one of the best attackers in the world and enjoyed a sensational 2011-12 season.

Ronaldo scored 46 goals in La Liga, helping Real Madrid to the title. He added 10 more goals in the Champions League, including goals in the round of 16 against CSKA, in the quarterfinals against APOEL, and in the semifinal against Bayern Munich.

Chelsea, who won the tournament in May, face a tough test after being drawn in the same group as Italian giants Juventus, Shakhtar Donetsk and Nordsjaelland.

Manchester United will be pleased to go against Braga, Galatasaray and Cluj, while Arsenal will be confident in a group with Schalke, Olympiakos and Montpellier.

Celtic, however, face daunting matches against a dominate Barcelona team, as well as games against Spartak Moscow and Benfica.

Here's a complete list of the group matches of this year's Champions League tournament:

GROUP A

Porto

Dynamo Kiev

Paris St Germain

Dinamo Zagreb

GROUP B

Arsenal

Schalke

Olympiakos

Montpellier

GROUP C

AC Milan

Zenit St Petersburg

Anderlecht

Malaga

GROUP D

Real Madrid

Manchester City

Ajax

Borussia Dortmund

GROUP E

Chelsea

Shakhtar Donetsk

Juventus

Nordsjaelland

GROUP F

Bayern Munich

Valencia

Lille

BATE Borisov

GROUP G

Barcelona

Benfica

Spartak Moscow

Celtic

GROUP H

Manchester United

Braga

Galatasaray

Cluj