Mikel Arteta says he was pleased with Arsenal's performance against in their win against Olympiakos but is frustrated with how his team concede goals.
Arteta impressed with team but says some moments in match 'completely unacceptable'
PA - Press Association STUDIO
Mikel Arteta admits he saw the worst and best of Arsenal after they came from three goals down to snatch a 3-3 Premier League draw..
