Zambia took the lead early on, though it wasn't Mbesuma who scored it was some bloke called Chamanga. Tunisia looked way below par from the parts of the match I saw but equalised in the first half through Dos Santos and from then on there only looked like one winner as Tunisia would then score 3 goals in the second half with Bouazizi and Dos Santos getting another two goals therefore completing his hat-trick.
As for Mbesuma himself from what I saw of him he was just walking around not really doing anything. I heard he had a couple of shots but the Tunisian defence kept him quiet. Which begs the question. Is he really good enough to play for a team even as bad as us?