Darron Gibson's magnificent 15th-minute cross allowed Mirallas to set Everton on their way and Round hailed two of his team's key performers on the night.
"I was very pleased with Kevin," he added. "To come back and show the sort of form he has, it will give him a lot of confidence.
"He has had a real stop-start season with injury and I think we saw signs of him getting back to being sharp and match-ready. His quality finish was what he is about.
"Darron Gibson controls the middle of the pitch for us and I thought his passing was excellent."