Atletico Madrid manager Diego Simeone rued his side's missed chances in Tuesday's match, calling the 3-2 defeat away to Olympiakos "a very negative result for us."
Los Rojiblancos fell two goals behind after half an hour and though Mario Mandzukic cut the lead to one shortly thereafter, Simeone's men could not find the equaliser.
Olympiakos scored on three of their four shots on target and had just seven shots total, while Atletico failed to put a way a host of good chances, despite taking 19 shots...
Olympiakos got their Champions League campaign off to a winning start as they recorded a 3-2 victory over Atletico Madrid in the Group A clash at Karaiskakis Stadium.
Arthur Masuaku opened the scoring for the hosts and Ibrahim Afellay doubled their lead after 31 minutes before Mario Mandzukic pulled one back for Madrid before half-time.
Konstantinos Mitroglou made it 3-1 midway through the second half before Antoine Griezmann struck for last season's beaten finalists at the end.
Eric Abidal was the...