I don’t think Benfica will be able to win the game, no matter what, because Chelsea hardly lose games against Benfica. Even though, for now, we can consider Jose Mourinho as a big threat to them, Chelsea has not changed that much, so he might break their strategy and end the game in a draw. But still, I have higher hope that Chelsea will definitely end up winning the game, because it will be easy for them. As they lost their first game in the Champions League, they won’t like to miss this opportunity.
First of all I will say that Chelsea lost their first match. And chelsea will be desperate to win this match. The team will try their best to qualify for the knockout round of the Champions League. Chelsea have spent a lot of money to build their squad this season.
Secondly I do not see any reason to think benfica is too strong. Benfica lost their first match at home against a team like Qarabak. They won't be able to resist a team like chelsea with such a shaky squad.