No he just needs to put himself in a position that stops a fullback making it 3 v 2 all the time. Look at how David Silva worked as an example, he didn't lunge in as you suggest we want him to but made in damn difficult to stroll past him. Mind you David was a supreme talent. Mahrez does have so much talent but the way our team plays he needs to be more responsible with his defensive positioning. If we were a team that played on the counter there would be few better than him, but in a possession based team his 30% rate of shots on target to attempts is not so good. A top pass to Sergio yesterday - we just need more of that.