Brought on by Pep Guardiola with City trailing 2-1, Kevin De Bruyne scored one and made a 91st-minute winner for fellow sub Oscar Bobb as the Premier League champions won a thriller.
Manager Mikel Arteta has worked on Arsenal’s composure, but they lost control against West Ham, raising doubts about the Gunners’ hopes for this season.
AC Milan winger Christian Pulisic has received a deluge of death threats and abuse on social media following their fiery 1-0 victory at Lazio in Serie A on Friday.