By Jamie Spencer Manchester City snatched a 98th minute equaliser to deny Arsenal a first win at the Etihad Stadium since January 2015 and remain at the top of the Premier League table. It was a monumental effort from the Gunners, who played the whole second half with ten players after Leandro Trossard was sent off just before the interval. Erling Haaland’s landmark 100th goal for Manchester City opened the scoring and looked like it would see the hosts maintain their unbeaten start to the campaign. But Arsenal struck back, first with a stunner from Riccardo Calafiori and then a bullet Gabriel…