I think for Potter champions league is the last chance to prove himself otherwise he can get fired just after losing the game against Real Madrid, that's why I expect to see Chelsea playing with full power against Real Madrid but on the other hand, since for Real Madrid champions league is the first priority I don't think if Ancelotti will let Chelsea win this game easily.
When we are talking about champions league, Chelsea of now under Graham Potter is not can not win real madrid. I'm still wondering how will manage to win real madrid when their performance is not tough . Real Madrid will always win Chelsea as far as this season is concerned.
After seeing Chelsea who have suffered their own home defeat by Aston Villa. So I think we will definitely not expect too much from Chelsea. because after all Potter was really unreliable. Aston Villa, who wasn't even seeded, managed to beat Chelsea quite tragically with 2 goals. so we can't imagine what will happen when faced with a strong team like Real Madrid. Real Madrid will likely have the upper hand in the quarter-finals later.