Yeah, I think it's 3 marking zonal across the 6 yard box and the others man to man. I'd prefer our best headers marking man to man andI *think* (and I could be wrong here) our defensive system for set pieces is a mixture of man to man and zonal. It looks like we are leaving 2 or 3 defenders covering a zone and then other players to mark the players considered the opposition's best at attacking a set piece. I'd have to watch a few replays to see if this is correct but from my seat at the games that is how it has looked to me.
others used for zonal.