I often play tennis with my friends on weekend unless it rains.
Most of the tennis courts which we usually use are artificial turf surface, but today, it was a clay surface.
A clay court can not be used even it rains very little or it is a freezing day in winter.
So, the courts we used today are scheduled to be changed to artificial turf within a couple of years.
It is sad that the number of clay courts will become nearly zero in my city, even there are still many of them in European countries.
