You won't know until you see how the lighting is and what shutter speeds you can get at ISO 3200.
Just make sure that you do not under expose any 6400 ISO shots because if you have to push the exposure in post, then the noise will be much worse.
I made a 18x12 print of this shot and I was very pleased with the quality (ISO 3200):

Just i don't want to go under 1/500 or 1/640, sometimes 1/640 is not fast enough to freeze few actions so i can't be sure that 1/400 or slower will do fine for me, so i will try to be minimum 1/640 even to crank that ISO to the highest.
I will start with 500 as the match will begin in the evening before the sunset about 40 minutes, then the second half will be under the field light which i can't trust it will be enough






