Cristiano Ronaldo is ahead in terms of overall European goals, but Barcelona's Lionel Messi remains the top scorer for any single club in UEFA history, while Sergio Agüero is the leading continental marksman for two of this season's group stage contenders. UEFA.com meets all the challengers' most prolific scorers in UEFA club competition*.

Arsenal: Thierry Henry (42)

Atlético: Sergio Agüero (20)

Barcelona: Lionel Messi (89)**

Basel: Marco Streller (24)

Bayern: Gerd Müller (62)

Benfica: Eusébio (56)

Beşiktaş: Oktay Derelioğlu (14)

Celtic: Henrik Larsson (35)

Club Brugge: Gert Verheyen (23)

CSKA Moskva: Vágner Love (30)

Dinamo Zagreb: Igor Cvitanović (15)

Dortmund: Marco Reus (21)**

Dynamo Kyiv: Serhiy Rebrov (31)

Juventus: Alessandro Del Piero (54)

København: Dame N'Doye (16)

Legia: Miroslav Radović (15)**

Leicester: Ken Keyworth (3)

Leverkusen: Ulf Kirsten (35)

Ludogorets: Roman Bezjak (8)

Lyon: Juninho Pernambucano (18)

Manchester City: Sergio Agüero (27)**

Monaco: Viktor Ikpeba (14)

Mönchengladbach: Jupp Heynckes (45)

Napoli: Edinson Cavani (19)

Paris: Zlatan Ibrahimović (20)

Porto: Radamel Falcao (22)

PSV: Willy van der Kuijlen (25)

Real Madrid: Cristiano Ronaldo (82)**

Rostov: Dmitri Poloz (4)**

Sevilla: Frédéric Kanouté (28)

Sporting CP: Liedson (25)

Tottenham: Jermain Defoe (23)

Thierry Henry scored 42 UEFA goals for Arsenal ©Getty Images

Eusébio and Gerd Müller, top scorers for Benfica and Bayern respectively ©AFP

Serhiy Rebrov is Dynamo's top European scorer ©Getty Images

Sergio Agüero is Man. City and Atlético's top UEFA scorer ©AFP/Getty Images

Cristiano Ronaldo is Madrid's all-time top scorer in UEFA games ©Getty Images

* UEFA club competition means UEFA Champions League/European Cup, UEFA Europa League/UEFA Cup, UEFA Super Cup, UEFA Cup Winners' Cup, UEFA Intertoto Cup and European/South American Cup

** currently registered as a player with the club

Last updated after matchday two.