the tournaments are played on flat surface, called a tennis court. the measurements of a tennis court are set by the itf. the court is long and wide. its width is for singles matches and for doubles matches. tennis is played on a variety of tennis court types. each type has to be played differently. there are four main types of courts based on what's used to build the court surface, clay, hard, grass and carpet courts. the itf ranks them by five different speed ratings from slow to fast.