The Manchester United manager has revealed the plan he abducted to beat Arsenal at the Emirate Stadium on Saturday.
While hailing his goalkeeper, David De Gea, the Portuguese said his plan to catch the Gunners on counter attack worked.
Jesse Lingard scored twice after Antonio Valencia’s early opener as United recorded back-to-back away wins in the Premier League for the first time this season.
Alexandre Lacazette score early in the second half and Mourinho admitted his keeper’s heroics had helped decide a “phenomenal game” between the long-time rivals.
He told BT Sport, “I told him after the match – what I saw today was the best goalkeeper in the world.
“In big matches you need goalkeepers to be there for you, but all the effort from the players was magnificent.
“It was phenomenal game. I loved the way my team played and fought. But I have to also say that Arsenal played, in some periods, amazing, attacking football, creating difficulties for us.
“The plan was when they have to the ball we all have to defend, starting with the attacking players. When we have the ball, however, we had to counter-attack fast to score goals.
“Of course, they can say they had chances, but we fought and had a great goalkeeper, too.”
On Paul Pogba’s red card, Mourinho said, “I don’t know. I leave for you [the media] that one.”