Arsenal boss Arsene Wenger feels their win at Chelsea affected the performance in last night's 0-0 draw with Champions League opponents Marseille.
Wenger reckons the two performances were linked.
He said: "(It took it out of us) emotionally more than physically maybe. It is difficult to be on a high three days later but we still had the opportunities.
"(Aaron) Ramsey in the first half had two great chances and Gervinho had a great chance. In a game like that you expect to take one of those chances."
The result means Arsenal did not manage to confirm safe passage to the first knockout round but they remain favourites to top Group F, while Marseille sit second.