Nobody forces you to play exactly 2 games (even if it seems so in rules). You can play 1, 3 or 15 games, it's on ly up to you and your opponent to agree. If he runs away after his pick, you can report a free win for you pick. If he runs away before playing his pick, you can swallow it and move on to play with someone else, unless he told you what he picks before he ran away.