In the first group game away, Norwegian giant, Rosenborg could not make a good showing. Just after three minutes, Bayer Leverkusen took the lead after Eren Derdiyok's assist to Patrick Helmer, who sent the ball easily to the goal.
The Germans continued to press on Rosenborg's defense after scoring and they had the ball control in most of the first round, while Rosenborg had trouble keeping the ball. Rosenborg's lack of control ended with a difficult first half with 2-0 to Bayer Leverkusen.
Rosenborg got to hold more on the ball and played a more organized game in the beginning of the second half. However, the Norwegian team could not stop score to be 4-0 with Patrick Helmer's two successive goals in 2 minutes.
In the other matches in Rosenborg's group, Aris Thessaloniki won 1-0 over Atletico Madrid in Greece. The Greek team will visit Rosenborg on 30 September.
Bayer Leverkusen – Rosenborg (2-0) 4-0
UEFA European league, BayArena, Leverkusen
1-0 Patrik Helmer 3 '
2-0 Stefan Reinartz 38 '
3-0 Patrik Helmer 58 '
4-0 Patrik Helmer 60 '
Rade Prica 76 '
Daniel Örlund – Mikael Lustig – Mattias Bjärsmyr – Vadim Demidov – Mikael Dorsin – Mark Henriksen (Jamtfall 72 ') – Anthony Annan – Roar Strand (Sare 56') – Per Ciljan Skjelbred – Steffen Iversen (Olsen 79 ') – Rade Prica
Bayer Leverkusen (4-4-2):
René Adler – Daniel Schwaab – Sami Hyypia – Manuel Friedrich – Gonzalo Castro (78 Vida ') – Stefan Reinartz – Lars Bender (Balitsch 66 ') – Eren Derdiyok (Barnetta 78') – Sidney Sam – Nicolai Jørgensen – Patrick Helmer