Tomato Question

I was taught for instance when you buy blooming plants, ie petunias, to pinch blooms off after planting and let bloom again after roots are established.
Well my tomato plants are still very small, about 6 inches tall, one is starting to get bloom, should I pinch it back and let it gain more roots and more strength. Thanks Txsdar

Have the plants already been set out in their permmanent location? If so and there is only one blossom my inclination would be to leave it alone.