Although Kolkmann admits that concrete courts cost substantially more initially than asphalt, an asphalt surface often requires more frequent and costly upkeep over its lifespan to repair cracking and settling. "Through our own recordkeeping, we estimate that an asphalt court will be unavailable for play, due to repairs being made, for about 100 days over a 20-year period," he says. "During this same time, a post-tensioned slab would be down for about 20 days. In our climate in the upper Midwest, repairs can only be done in the summer, when everyone wants to play. For a private court, the downtime may not be as crucial. But for a club, it can be a substantial unknown cost in lost revenue."
So, a lot of people are very competitive in everything they try. They want to have the best business if they get into it, they want to be the best at their job when they get it, etc. If you are that sort of person and you look for excellence in your game but do not want to commit professionally to this then it is going to take an upwards of 5-10 years to play at some decent level like club level or USTA sponsored tournaments.
The head-light balance point is rarer in professional tennis than it once was, as the sport has converted to larger-headed rackets, stiffer rackets, stiffer strings, more western grips and accompanying stroke production, and more topspin. The head-light balance point is most optimal for the serve and volley style with a continental grip. Serve and volley is no longer a viable option for nearly all professionals as the mode of playing for most points in a match. Head-heavy rackets became popular, mainly with recreational players, primarily with the introduction of the Wilson ProFile widebody racket. The head-light balance makes volleys and serves easier to produce, while groundstrokes are less stable. The head-heavy balance makes groundstrokes more stable, which typically increases the player's comfort for swinging harder to add power, but makes serves and volleys more cumbersome. A head-heavy balance also puts more stress on the elbow and shoulder.
The components of a tennis racket include a handle, known as the grip, connected to a neck which joins a roughly elliptical frame that holds a matrix of tightly pulled strings. For the first 100 years of the modern game, rackets were made of wood and of standard size, and strings were of animal gut. Laminated wood construction yielded more strength in rackets used through most of the 20th century until first metal and then composites of carbon graphite, ceramics, and lighter metals such as titanium were introduced. These stronger materials enabled the production of oversized rackets that yielded yet more power. Meanwhile, technology led to the use of synthetic strings that match the feel of gut yet with added durability.
Wheelchair tennis can be played by able-bodied players as well as people who require a wheelchair for mobility. An extra bounce is permitted. This rule makes it possible to have mixed wheelchair and able-bodied matches. It is possible for a doubles team to consist of a wheelchair player and an able-bodied player (referred to as "one-up, one-down"), or for a wheelchair player to play against an able-bodied player. In such cases, the extra bounce is permitted for the wheelchair users only.
Tennis is played by millions of recreational players and is also a popular worldwide spectator sport. The four Grand Slam tournaments (also referred to as the Majors) are especially popular: the Australian Open played on hard courts, the French Open played on red clay courts, Wimbledon played on grass courts, and the US Open also played on hard courts.