#5 Chelsea need to learn how to earn bigger advantages

Not once but twice now we've seen, Chelsea have shown spectacular promise, both with and without the ball. Yes, there are a lot of positional alterations that Frank Lampard has to instil in his team while defending off the ball, but he surely knows his side are in to play exuberant, fast-paced football.
However, one problem that may have gone unnoticed, due to a larger issue in the form of defending crosses, was how Chelsea struggled to increase the deficit during a one-goal lead.
We saw it against Leicester City as well, as the Blues could have hammered three or four in and sealed the result of the game. But, they allowed the opposition to get back and eventually punish them.
Here again, Norwich equalised not once but twice. When they lead 2-1, Andreas Christensen had a free header. Credit Tim Krul for a jaw-dropping save, but the center back could have and should have given his side a two-goal cushion.
The same goes with Pulisic, who while trying to make himself a hero, shot from an extremely acute angle when Abraham was in a pocket of space inside the penalty area.
This is the difference between Manchester City, Liverpool and Chelsea. The former two sides convert promising stages of play into embarrassing moments for their opponents.