I'm one of those that still thinks garcia is a beatable fighter.
You need to take that left hook away from him, there is a variety of ways to do that, and if you can, I think he can be thoroughly undressed.
Virgil hunter is a good enough trainer to come up with a winning gameplan, but if khan is able to pull it off remains to be seen
Garcia can be beaten inside, ward/green style but khan doesn't have the inside game, so he'd have to use lateral movement and footspeed to circle away from the hook, and use his speed to throw quick 1-2's and out, but he's got to protect his chin on the way out.
I'd lean towards Garcia but wouldn't be shocked if khan beat him, he's obviosuly very talented, just flawed