I was very lucky the first time I played tennis. I won the first four games and was beginning the fifth when the man I was playing against said with a shouting voice "I stop playing against you. You are winning all the time. It is not possible to be so lucky."
In this sentence all the time refers to the time I was playing, so progressive should be correct — but if all the time referred to a behavior, then would the simple present be better than the progressive one?