Leighton Baines has made such free-kicks his speciality but the England man had a watching brief this time.
Martinez said: "Kevin found it very frustrating, as you would expect. He was surrounded by Aston Villa players and we couldn't get into the final third.
"They were trying to stop us really high up the pitch. Kevin was working extremely hard without getting any sort of joy.
"I think Kevin Mirallas' quality is as good as Leighton Baines, obviously with different feet. It would be difficult to separate them.
"What I like about the two players, more than the technical aspect, it's the meaning of scoring a goal to get three points. They've both got that mentality of controlling the moment and that's something you need to be born with."