Welcome to Sub Zero's nightmare: Major Jackson Briggs
If he wanted to, Jax could sit back in a corner all day and ground pound till the cows come home. GP completely nullifies Sub Zero's turtling game and forces him to play offense. Jump-ins get countered with aaHK. Crossovers get stomped out with a backbreaker and slides punished with an uppercut. Just apply a constant stream of GP or MGP and Subby can't do much of anything.
As mentioned, Subby hates Jax with a passion because Sub gets taken out of his element in this fight. Sitting back and throwing, or faking ice balls is a lost cause. Being forced to play offense, Sub is going to have to anticipate a GP and try a JK, ground freeze, uppercut combo. Jumping at the wrong time will likely result in eating Jax's aaHK, but it's a risk you have to take. Slides are best used from within sweep range as any further back is easily noticeable. Once you get in close, stay on Jax and keep him guessing with freezes and ice puddles. The problem, of course, is getting inside in the first place.
Jax smashes Subby, 9-1.