What to do with my Cuke's?

Evening All!  I've never grown cucumbers before so thought I'd give them a go this year.  I planted 3 seeds in a 5" pot, not thinking that they would all germinate.  Well, all three have come through.  What do I do now?  Can I wait until they've got a couple of true leaves and then pot them on individually? Or will they not appreciate that sort of disturbance?  Do I need to remove two of the seedlings and give one the best chance?  They are miniature white cuke's from the real seed co.  Cheers!