A very brief duel occurred in 21 BBY between Jedi Anakin Skywalker and Dark Jedi Trenox.
Anakin Skywalker tracked Trenox to a seedy Coruscant bar known as Bentho's Nightclub. After confirming his target was inside by Dexter Jettster, Skywalker confronted Trenox and ordered him to stand down. Trenox enraged, told Skywalker not to give him orders, and attacked, pushing Skywalker back with his aggressive lightsaber style. After a brief and undetermined struggle, Trenox retreated, to attack the Jedi Temple, leaving Skywalker to make his way through the docking bays.