An interesting pair of numbers, embracing nearly all the high-probability
Trifecta combos (70 of the top 72 combos contain a 1, 2 or both).
Mirror images in simulations, e.g., 5-1-4 and 5-2-4 are equal probabilities.
One of them always gets the first point, the other is always up first in Round 2.
Yet, they are quite different in actual play, especially when you consider serve/receive advantage re: singles/doubles.
So, in singles or doubles, how do your choices vary depending on who is in those posts?