HYDRATE. Water is SO important for this sport. Also electrolytes - potassium - magnesium.
My BPA free I ❤️ MY DOUBLES PARTNER!!! water bottles hold 32oz of water with a wide mouth - to help get loads of fresh water inside your body! I drink mine room temp to avoid brain freeze and hydrate pre match too!
Always keep either pickle juice or mustard in your bag for emergency cramps too.
My new tennis friend buys Magnesium flakes and mixed one cup with one cup of hot water and puts it into a spray bottle and applied it directly to her body (calves and arms) right before the match. I tried it - it felt oily but my legs felt great!