Arthur vs Evan
You hold your tongue, or I will make time to teach you some manners.
Arthur to Evan
The duel between Arthur and Evan occured after Evan insulted Arthur's "authority". Evan managed to disarm him at one stage, but Arthur resulted in defeating his opponent, but when he ran him through he vanished into thin air, suggesting that Evan was merely an allusion created by Anhora (The Labyrinth of Gedref).

Victory: Arthur
Series 1: Merlin vs. ArthurArthur vs. ValiantMerlin vs. Edwin MuirdenSir Owain vs. Tristan de BoisSir Pellinore vs. Tristan de BoisUther vs. Tristan de BoisArthur vs. EvanMerlin vs. TaurenMerlin vs. KilgharrahMerlin vs. Nimueh
Series 2: Merlin vs. JonasArthur vs. MorgauseArthur vs UtherOlaf vs. ArthurArthur vs. Kilgharrah
Series 3: Merlin vs. MorganaMerlin vs. the GoblinMerlin vs. the Sidhe elderGilli vs. NollarUther vs. GilliMorgause vs. Merlin & Gaius
Series 4: Showdown with MorganaUther vs. The GleemanArthur vs. DeríanEmrys vs. the Knights of the Round TableEmrys vs. MorganaArthur vs. Sir LancelotArthur vs. Sir ElyanArthur vs. HeliosGuinevere vs. Morgana
Series 5: Arthur vs. Odin