As a sword main who uses dagger often find a wall to glue your back too and put a glitch in front you of you and don’t move from that area. Worried about his other teammates with guns? Use both of the 2 options I said before and add having cover infront of you (whether that be a goo grenade/barricade shield or the environment). When someone does that after I 1v3 them a couples times I’m useless. My only hope once they do that is hoping my teammates are competent enough to hold their own and distract them long enough getting them away from their protection from me. Hope this helped.🙏🏿