Look at your opponents rebounding and inside scoring in previous games. If he is really running SGs and SFs he might have weak rebounding. With weak rebounding you can run a 1-3-1 zone and put your strongest rebounder at C. If you have an advantage in rebounding you should be able to hold down the inside while giving you maximum perimeter defense. Personally I don't think people use 1-3-1 enough, but everyone has their own theories.