Pedro's treble and Cole Palmer struck the goals at Villa Park for the win.
Rosenior said of Pedro afterwards: "He’s a top player.
"I think he’s growing in confidence. His hold-up play, the energy he puts into the team in terms of his press, his movement.
"His goal with the left foot is world-class, the finish is magnificent, but actually I’m really delighted with his two tap-ins that he got. He was in the right place at the right time, we’ve worked hard with him on that.
"He gets the hat-trick, but it’s really hard to single someone out because I felt it was an outstanding team performance. Going through the back line and midfield – Moi, Enzo, Romeo when he came on, Garnacho – I just felt it was an outstanding team performance."
Indeed, on Alejandro Garnacho, Rosenior also said: "He’s really impressed me in the last few weeks and he’s impressed me the most when he’s been out of the team, because his reaction to being out of the team, his professionalism, the intensity that he’s trained at, it’s no coincidence that he’s gone and performed like that today.
"That’s the most pleasing thing for me because he deserved that today. He should have got a goal but he was in the right position and I loved how unselfish he was to set up the goal for Joao."