Up until he was sent sprawling onto the ground, the Sith wasn't taking this fight seriously, not really. One mere soldier couldn't be a real threat to a Sith!

He's definitely taking Garyn seriously NOW. The Sith reaches out with the Force for his lightsaber as Garyn pins his wrist. A touch of power presses the activation button and brings the blade back to life. Another pull sends the blade flying at Garyn in a deadly arc.