Solskjaer said, "Finally we kept a clean sheet. A very professional performance. We didn't hit the heights that we can do but we were in control, kept plugging away and got the goals.
"A good first touch from a sub! When you see big Romelu Lukaku running towards you, as a keeper you might take your hands away! We were sluggish in the first half, it was like a testimonial, too many square passes.
"We go to Dubai after the FA Cup game, you need that fitness work because we will need legs come the end of March."
He also said, "You'd be happy with four wins from four - we haven't conceded from open play yet either.
"We were slow in the first half but we controlled the game well, we concentrated and overall it was a very professional performance.
"In a five-minute spell we gave them two or three chances but then we settled down again. Newcastle is a fantastic club, fantastic crowd, you expect them to attack you but Victor Lindelof and Phil Jones were fantastic.
"Marcus Rashford has the Cristiano hit, it swerves everywhere, but I liked his goal today. Calmed himself down, just passed it in. Well done.
"He is only 21, you have to remember that. You need to rattle Paul Pogba at times to get him going, he has been immense for us."