The Gunners lacked cutting edge at Stamford Bridge while the former Barcelona star dominated against Brighton How to solve the problem of an inability to take your chances? That is the question that will haunt the Arsenal head coach Renée Slegers over the coming days. In their 1-0 defeat by Chelsea, Arsenal applied more than enough pressure to make a difference but in registering only two of their 18 shots on target, a fundamental lack of ruthlessness remains. They dominated the opening stages…