My experience with short races is that if you lose the first set and get even the second set it's over! When you play ahead sets and win a set, your opponent will usually play one more to try to get even. Playing races it's hard to keep a guy playing for several sets. Maybe they will go for two sets if you're lucky. You need to get them stuck and keep them stuck, that's my opinion. I made my best scores playing 9-Ball getting ahead from the get go. Losing the first set usually meant I was now playing to get even.