Like Fernando, you can deny Drogoz' ultimate by using your own ultimate

Dragon Punch will inflict no damage to you as long as you stand in your Assert Dominance field. Be sure to hit the ground and plant your flag before you get punched though, or you'll die in midair.

Your shield offers little protection from Drogoz while he's in the air. Keep an eye on where he is so you can shoot him or move to better cover.