Olympique Marseille once again were the boys against the men as they slipped to a 2-1 home defeat against an unimpressive Arsenal in their Champions League opener after wasting a handful of chances.
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OM, who played better than the visitors for most of the Group F game at their Stade Velodrome on Wednesday, conceded two second-half goals from Theo Walcott and Aaron Ramsey before Jordan Ayew reduced the arrears in injury time.
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"It's frustrating because before they opened the scoring we were in control," said coach Elie Baup.
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Marseille's chances of qualifying from a group also featuring Napoli and last season's runners-up Borussia Dortmund have already taken a serious blow, with the Ligue 1 team travelling to Germany in two weeks.
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Arsenal lead Group F with Napoli, who beat Borussia 2-1 on Wednesday.
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"We will need to build on what we did good (against Arsenal) and be more efficient," Baup explained.
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"There is no room for error in the Champions League - that's what high level is about. Arsenal weathered the storm and then took their chance."
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The London side, who barely created an opportunity in the first half, stepped up a gear after the break and Walcott made the most of Jeremy Morel's defensive blunder to open the scoring after 65 minutes with a fine half volley.
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Ramsey added a second goal with seven minutes left, firing home with a low drive after being left unchallenged just outside the area.
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"Marseille played a good game but we were patient enough to win it in the second half," said Arsenal manager Arsene Wenger.
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"We had one or two opportunities and we converted them," said defender Laurent Koscielny.
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Two years ago, Arsenal beat OM at the Velodrome in a Champions League Group game, winning 1-0 with a late goal.
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Although Wednesday's result suggested OM have not improved in two years, the Marseille players believe they are on the right path.
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"We proved that we are a match for great teams like Arsenal," forward Dimitri Payet said.
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"We now have to win an away game to make up for this defeat. We have no choice," said Alaixys Romao.
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That is exactly what they did two years ago, when a brilliant strike by Mathieu Valbuena earned them a 3-2 win at Borussia Dortmund and sent them into the last 16.
They did their best against Arsenal was Arsenal was just too good for them. I blame their defense though!