I have a problem and will like to ask for ur experience and why do it happen ?? My problems: - My habit of not drinking water made mi play like @!#$ when i am in a hot(temp at abt 37 C) hall. When i sweat too much, i tends to feel weak and affect my accuracy. After the game, i will sick juz like having fever. - When i play with my younger brother and his friends and also my schoolfriends, it tends to affect my skills. i dun want to smash at them and their stroke are weak so after i play with them, i join my teacher. But i dun noe why i play at the same as my friends. I remember the best time i play is in my school hall(normal room temp) with my teacher all day. Does the level of the ppl u play with affect ur skills too ???? - When i play with many other racquets for one day cos i forget to bring my own, and the next day i try to play with my own racquet. It seems that i couldn't control my racquet.