Karim Benzema and Marco Asensio struck for Real Madrid as they dominated 10-man Chelsea and opened up a 2-0 Champions League quarter-final first leg lead on Wednesday.
The record 14-time winners and reigning champions eased to a comfortable win against Frank Lampard's side, who had Ben Chilwell sent off in the second half for pulling down Rodrygo Goes as he ran through on goal.
Benzema netted from close range after 21 minutes after Kepa Arrizabalaga tipped a Vinicius Junior effort into his path.
"We are satisfied with the result, for the performance but it's not over yet, we have to fight, to sacrifice for another 90 minutes at Stamford Bridge," said Real Madrid coach Carlo Ancelotti.
Meanwhile, Stefano Pioli said that AC Milan should have given themselves more than a one-goal lead in their Champions League quarter-final derby with Napoli after their fellow Italians finished the first leg with 10 men.
Milan had a quarter of an hour to extend their advantage earned from Ismael Bennacer's first-half strike when Andre-Frank Zambo Anguissa was sent off for two quick-fire bookings.
"It's the only regret we have, we should have been more clear-headed," Pioli told reporters.