With a long history of providing athletes with both professional and casual athletic options, playing tennis has been a world-wide hobby and career for millions of people for decades. Nationwide sports complex design will often take things into account such as the direction of a tennis court so as to alleviate the impact of the sun during play on an outside court. The floor of a tennis court will often be made of clay or a synthetic substance but there are also many tennis courts made of concrete with some courts sporting a grassy surface.