I started hitting for about 40mins around 7.30am then stopped playing for a few hours before my game started at around 10.30am. I took alot of fluids (water and energy drink) after the hit out and by the time I started playing again it was around 30degrees Celsius and my whole body was feeling exhausted and did not want to be there. On the way to the club (whilst driving) I had a can of energy drink (you know red bull). this was taken like 3hours before my game at 10.30am. On the court i started feeling like my whole body was numbing and really struggling for breath and just wanted to finish the game and sit in the shade. In the end, i just didnt feel like being there. My question is, what was I suffering? Lack of fluids? dehydration? sunstroke? did the redbull affect my game? The annoying part was I lost to the heat and lack of motivation in the end. Anyone can tell me what happened?