When Arsenal beat Tottenham 2-0 in last month's north London derby, it felt like a big moment for Mikel Arteta's men.
The Gunners showed their class in the first half to cruise into a commanding lead before holding firm at the back after the break. That result moved them eight points clear at the top of the table, and perhaps it was the first time that fans started really believing that this could be a title-winning team.
A week later, Arsenal refused to be denied as they played out a modern-day classic against Manchester United, eventually edging the five-goal thriller.