I can't do coffee before a match, nor do I dare use my pure workout supplement, they already make me want to rob a bank. Last match I had a coffee before hand, no where near enough water, and couldn't focus on the sights.
I hadn't thought of trying my aminios, that could help.
Probably best would be a light jog, stretching, a good breakfast with fruit and eggs, followed by lots of water and aminios. Call it the best of both worlds.