Phil Jagielka scored the only goal of the encounter, to dent the Gunners’ top-four hopes.
“In the second half we needed a bit more from the game so I changed some things and we were better offensively.
“We need balance. In the first half we were good defensively but needed more offensively. In the second we were better offensively but not defensively. The match is demanding and the end result, we can’t change that.
“We know we needed to be strong and solid, and to be competitive. After the negative result after the first half we changed things defensively and it gave us better options for 45 minutes but we could not find a goal.
“If we scored then it would have changed the match but defensively we conceded more chances than what we were doing first half,” Emery told Sky Sports.