I think you were lucky that's all, he had more chances to score, in total shots and on goal too... so, that's not the best tactic to go for.
In this season I wouldn't recommend narrow diamond even with only 3MC in midfield. I've watched some games and game stats of my friends matches and CL, Cup matches... even if you manage to get more ball possesion, he would obliterate in on-goal chances, and that's a risky thing to go for, cause you wouldn't be so lucky every time

I would go for the classic 4-4-2 stile, normal or defensive style of play, he has weak defense so you would take your shot there with your 2 strikers