You're kidding, right? With nothing conclusive to prove that he did the damage, instead of reporting it to the police and your insurer, you vandalized his property to the point that your actions left you bleeding. Yeah, he might have a case, if his claim is more reasonable to the court than the conclusions you drew.
He needs a comparison sample of your DNA to make a test, and tests are expensive. That said, there is no reason that a court couldn't accept test results into evidence. The tests and your rebuttal expert (you'll have one in that event, won't you) will probably be more costly than the damage, but it won't help if you still have stitches and are wearing bandages. I suspect that the bench officer would find it a happy change of pace.