Need help against a certain champion

Just last night I matched up against this one guy who had a skill that transported the two of us into this fighting ring of sorts. Was so frustrating. I was using someone squishy and I couldn't kill him fast enough before he killed me. And he made sure to always seek me out and use that skill on me whenever possible. Think it happend around 5 or 6 times during that match alone. Is there any way to counter or escape that skill besides killing the caster?