Frank Lampard had a penalty saved by Allan McGregor in the sixth-minute as Chelsea made a fast start, before Oscar's well-worked opener and the England midfielder's blistering second, a 30-yard free-kick.
Mourinho was even content that his team's powers waned in the second half.
"I'm very happy," he said. "I played so many times here, I won so many matches here, but we didn't have so many periods of such fantastic quality like we had (today).
"When I saw the second half growing into another destination, at the beginning I was a bit frustrated because I want more.
"But after five, 10 minutes I was thinking we didn't (give more) because we couldn't - we can't play that way for 90 minutes.
"The three boys behind Fernando (Oscar, Eden Hazard and Kevin de Bruyne) in the first half were fantastic and in the second half they disappeared. All of them they played national team matches.
"The team, when the creativity disappeared, we lost danger in our game."
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