Unai Emery has said that Arsenal need to ‘find the right balance’ after watching his side beat Chelsea 2-0 at the Emirates. Goals from Alexandre Lacazette and Laurent Koscielny were enough to secure all three points against Chelsea, a result which closed the gap on their London rivals to just three points. However, the result comes a week after the Gunners slipped to a surprise 1-0 defeat to West Ham at the London Stadium, and Unai Emery has told his…