Is this a good way to lose belly fat?

I weigh 175 and my height is 5 feet 4 inches. Everyday I play tennis for an hour, and sometimes i play softball at night. 2 days ago i started doing crunches at night( i did 75 each night) and i will continue doing 75 each night to lose belly fat. I know how to eat healthy so please don’t give me any of that information. So, Is this a good way to get rid of belly fat?