I'm of the opinion that it was a penalty. I think there was contact made, and my reason being that the guy marking Owen was one of the slowest players on the field. When you run at players and they lack pace, ofcourse they will either drop you or make a mistake when attempting a tackle because their reaction time is going to be slower, isn't it. He put his leg out late and drew it back in again after misjudging Owen's movement, but contact had been made by then.