Second half goals from Craig Bellamy and Chris Llewellyn followed.
John Toshack used three Wrexham players to the delight of the Racecourse crowd. Steve Evans started the game with Mark Jones and CHris Llewellyn coming on. Llewellyn's night was crowned with the 4th goal.
Ryan Giggs played the opening 45 mins in a line up that included Craig Bellamy, Simon Davies and Robert Earnshaw as well as goal scorer Koumas.
Both of Koumas' goals were top quality.
Match Report links
BBC
Sporting Life