Chelsea facing benfica is not going to be an easy task for them if not for any reason but because Jose mourinho will be trying to prove a point. Benfica coach Bruno lage was sacked few days ago after a terrible defeat by qarabag and won't be willing to accommodate another lost in their next game against Chelsea in the coming days and secondly the presence of a new coach requires an excellent performance just to protect his new job at the club. Apart from providing protection to his job, the new coach Jose mourinho is a high profile coach with a lot of achievement in his coaching career, so finding the best way to win won't be a difficult one for him.
Benfica should be able to understand Jose Mourinho if in the end they were defeated by Chelsea because after all he had just been appointed as a coach and certainly needed time to manage the team to be better and directly facing Chelsea was of course a very tough challenge for Jose Mourinho even though Chelsea was his former club but Chelsea's performance had improved so Jose Mourinho no longer recognized the strategy used by Chelsea currently.