Ice bath for the ankle in a five gallon bucket. Have her "write" the ABC's using her foot in the bucket - promotes ligament movement. KT tape, Arnicare cream and turmeric supplements (for swelling or bruising in the ankle). Biofreeze during play.
When DD was having knee problems she found Blue Emu balm worked well between games (no strong smell). I started using it for general "old man" joint aches and soreness and it seems to work.