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A denser pattern is often considered to deliver more control, at the expense of spin potential. A more open pattern is often believed to offer greater potential for power and spin. However, how much power is produced by a player can be strongly influenced by how a player adapts to the characteristics of the racket. Some players may hit harder with a dense string pattern, producing faster shots because of the added control from the dense pattern. Rackets, including those of much of the wood era, are marked with a recommended string tension range. The basic rule is that a lower tension creates more power (from the trampoline effect) and a higher string tension creates more control (less string deformation which results in a more predictable the power and angle of the departure from the string bed.) Some professionals used small-headed rackets with flexible-material strings (natural gut) strung at very high tension. Examples include Pete Sampras and Björn Borg. Some used large-headed rackets with very inflexible-material strings (kevlar). Andrei Agassi is an example. Many professionals during the standard wood era strung at relatively low tension and used natural gut string; both decisions were to increase the trampoline effect for more power. By contrast, almost every professional player today uses the much stiffer polyester string in their much stiffer rackets which also have larger heads and which tend to be lighter. Madeline Hauptman sold a line of rackets, called the MAD RAQ, which featured a Star of David pattern (a six-pointed figure consisting of two interlaced equilateral triangles), as it used three strings instead of two for stringing the racket. This pattern is used in snowshoes. This stringing pattern was said to feature less string notching, improving string lifespan. It was even claimed that many pro shops refused to carry the racket because less string breakage would reduce string and stringing service sales. It has also been claimed that the racket is more difficult to string than a two string racket. However, the Wilson T-2000-type requires a great deal more time for stringing than a typical racket and rackets of that series were very popular. Whatever the cause of the failure of the MAD RAQ in the marketplace, it was the only time a snowshoe pattern was used in tennis. Hauptman switched her racket line to a two string diamond pattern (PowerAngle). This pattern had already been used in much earlier rackets but had not had much popularity. It is said to be easier to string than the MAD RAQ but does not have the benefit of reduced string notching, at least not to the same degree. The claim is that this diagonal pattern offers more comfort than a traditional square pattern.
A legal service starts a rally, in which the players alternate hitting the ball across the net. A legal return consists of the player or team hitting the ball before it has bounced twice or hit any fixtures except the net, provided that it still falls in the server's court. A player or team cannot hit the ball twice in a row. The ball must travel past the net into the other players' court. A ball that hits the net during a rally is still considered a legal return as long as it crosses into the opposite side of the court. The first player or team to fail to make a legal return loses the point. The server then moves to the other side of the service line at the start of a new point.[54]
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.[12]
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."
The purpose of the Northwest Louisiana CTA is to make an positive impact on the tennis community by providing support and resources in the development of programs, events, leagues, and facilities promoting tennis as a lifetime healthful sport within North Louisiana to all ages and all skill levels. The NWLACTA will collaborate with the USTA and other associations and programs in the pursuit of these goals.