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Raheem Sterling's quick strike was neutralised by Mario Pasalic's second-half goal as Manchester City drew with Atalanta 1-1.
Atalanta snatched a late 2-2 draw away to Napoli amid chaotic scenes on Wednesday as Carlo Ancelotti was sent off amid protests from the hosts.
Raheem Sterling scored an 11-minute hat-trick and had a hand in all five goals as Manchester City came from behind to thump Italian side Atalanta.
A goal in deep into stoppage time by substitute Manor Solomon snatched all three points for Shakhtar Donetsk as they beat Atalanta 2-1.
AS Roma suffered their first defeat of the Serie A season as Atalanta stunned the capital side with a 2-0 win.
Atalanta issued a statement "disassociating" the club from racist chants by its fans after an incident in their match against Fiorentina.
Racist chants toward Dalbert Henrique prompted a brief suspension during a Serie A match between Atalanta and Fiorentina.
Dinamo Zagreb made a perfect start to their Champions League Group C campaign with a emphatic win over tournament debutantes Atalanta.
Martin Skrtel, signed by Atalanta to boost their defence as they make their Champions League debut this season, has left the club after 24 days.
Real Madrid will face Paris Saint-Germain in the Champions League group stage this season.
Atalanta continued where they left off last season with a thrilling win in their opening Serie A match on Sunday over SPAL.