Both Everton manager David Moyes and skipper Phil Neville spoke highly of Vellios after the friendly.
Vellios, known in the squad as Tolis, told evertontv: "This gives me more confidence to continue working hard and to be even more concentrated on what I am doing.
"I felt very good. I saw some players were injured two or three days before the game so I had hopes to play in the game. The team was tired but that is normal because we have been training hard."