He told uefa.com: "It's difficult in this team because we really depend too much on individuality.
"We have players like [Eden] Hazard, [Juan] Mata, Oscar and [Frank] Lampard - they are talented players so we are not speaking about tactics. It's a bit more difficult than my time with him [Benitez] in Liverpool.
"But it's good as well because we know what we have to do and we have the extra help from the talent of our players. It's not been easy for anyone but the team are improving.
"Every day you learn new things and you change a little bit. The key is to adapt to a new system, new players, a new style of football and that takes some time."