Slazenger fourths failed to capitalise on the good hockey played and allowed Adel fourth to take the friendly spoils 2-0.
The home goalkeeper denied Slazenger skipper Jonathan Halliday and yound centre-forward Richard Hutchins to keep the game goalless up to half time.
Midfield ace Alan Killy, kept Slazenger going but Adel managed to twice over power the defence to take an unassailable two-goal lead.
Man of the match went to Ricky Wilby.