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🎾 | [Scheduled to start around 20:21 on the 55th] Kei Nishikori's hard court return match.Play against Andujar, XNUMXth in the world


Photo Nishikori (left) and Andujar (right)

[Scheduled to start around 20:21 on the 55th] Kei Nishikori's hard court return match.Play against Andujar, XNUMXth in the world

 
If you write the contents roughly
Until this season of Nishikori, he is still regaining his sense of the game with 2 wins and 4 losses on the clay court.
 

20th "ATP250 Antwerp" (Antwerp, Belgium / October 10th-October 19th / Indoor Har ... → Continue reading

 THE TENNIS DAILY

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Wikipedia related words

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Tennis court

Tennis courtIt is,TennisFor doingCoats.

The size is vertical 23.77m= 78ft, Singles 8.23m=27ft, Doubles 10.97m=36ft. There are various materials used for the surface,ATP,ITFOn the official website, hard, clay, glass, carpet (including artificial sand containing sand described later) are roughly divided into four types. The above four types have different characteristics such as how to bounce the ball and how easily the foot slides, and each has an optimal play style. These factorsTennisIt fosters the individuality of the players in the athletes, and that individuality brings diversity to the tennis competition itself.

Hard court

cement,asphaltOften based onSynthetic resinEtccoatingMade and built. Faster ball than clay court (listed below), which is advantageous for players with fast serve and stroke and good volleying skills. On the other hand, in soft tennis, the friction is large and the ball slows down after bouncing, which is disadvantageous to players who mainly hit the ball. In addition, a cut serve utilizing the magnitude of the friction becomes effective.

The bounce is stable and there is almost no irregularity, so the players can use various techniques well, serving and returning volley in strokes and easy to play.[1][Page number required].

4 major competitionsInAustralian OpenThen. 1987Than,US OpenThen. 1978More adopted. The US Open court is faster than the Australian Open.

Playing on the hard court has a great impact on the player's body[2].. Tennis shoes for hard courts have a thicker bottom than those made for use on other courts.

There are various things even if it is hard,オーストラリアWhile there are many soft surfaces that are touched and dented,AmericaHas many hard surfaces on which the sphere extends. SurfaceCoefficient of frictionHowever, since the growth of the ball changes, it is necessary to respond to each tournament, but if anything, the result is often as good as the ability, and there is a tendency that there is less upset[1][Page number required].

Hard courts are relatively easy to maintain and manage compared to other courts. Therefore, recentlyleisureHard courts are most often used when setting up tennis courts at facilities.

The center of Japanese tennisAriake ColiseumHas adopted a semi-hard coat with a little flexibility.

Clay court

So-called "Sat =clay"It is a surface made by sanding on a solid ground of soil material. The materials used are various, and on the clay ground often seen in school playgrounds in Japan.Masago soilYellow clay is generally used. The situation is different from Japan at major international tennis competitions held around the world,AntucaThere are many tournaments that use red clay that uses. Especially famousFour major competitions OfFrench OpenIs. on the other hand,AmericaThen.Metamorphic rocksI often see "Har Tru" of green clay crushed and laid.Four major international competitionsIs one ofUS OpenHowever, it adopted green clay from 1975 to 1977.

2012 yearsMadrid MastersHe adopted blue clay, but was criticized by the players for being slippery and returned to red clay the following year.

Clay coat is easy to slide on, and requires a unique footwork technique. In addition, since it is generally easy to have a long rally race, it is generally the best court surface for athletes who are good at ground stroke and footwork. For example, for a professional playerRafael NadalIs the representative.

The ball is slower than the hard court, but the bouncing is high. As a result, the positioning will be lowered and the type with excellent stroke and footwork will be advantageous. The number of cases where shots are not decided compared to hardware and grass increases, the rally becomes longer, more precise assembly is required, and physical strength is required compared to others.[1][Page number required].

スペインThere are many clay-raised specialists in Europe and South America. There are many upsets in which the players in the lower rankings make a big success[1][Page number required].

Grass court

The glass coat is the fastest coat.Golf Ofグ リ ー ンSimilar toShibaIt is a court that is spread all over, and conditions such as the health condition of the turf, maintenance, and wear affect the play. Grass courts have a lower trajectory and are faster than any other court. When the ball bounces, it becomes irregular, which is good for a rather (or rather) playing style. The most famous glass court isWimbledon OfCenter CourtIs. PreviouslyAustralian Open,US OpenWas also done on the lawn. The players who are most good at lawn courts areJohn McEnroe,Martina Navratilova,Pete Sampras,Roger Federer,Venus WilliamsAre known. In JapanGlass Court Saga Tennis ClubWas adopted by the former, and was once the name of "Wimbledon Kyushu".

Aggressive tennis is advantageous because the ball bounces low and slips. Players who are good at strokes can not play calmly, and players with big serve often upset.[1][Page number required].

Since grass is used, it requires frequent care such as watering and mowing, and is more expensive to maintain than other types of courts. Therefore, the number of adoption cases has decreased dramatically at present. Annually in the Wimbledon Championship and its outposts starting in late June, and the week following the Wimbledon ChampionshipTennis Hall of Fame ChampionshipOnly 7 tournaments of (Hall of Fame Championships) will be held. Since there are few lawn coats in the world and it is not possible to practice, experience of actual battle is important[1][Page number required].

Indoor court

wood,cement,carpet,Artificial grassIndoor court with a floor such as.Soft tennisIs a typical indoor competition (Tokyo Indoors), which is held on wooden floors, or surfaces made of wood. Hard tennisToray Pan Pacific Open Tennis Tournament"TorayMade of artificial turf, both Tokyo Indoor and TorayTokyo gymnasiumIt was held at (Toray has been held in Ariake since 2008). In this way, wood is often laid in soft tennis, and carpet is often laid in hard tennis. With soft wood tennis, bouncing stops as with hard courts, but with hard tennis it starts to slide, and it is probably the fastest surface over turf. It is not well known that there were once professionals practicing with this board-covering court to deal with Wimbledon.

In the tennis season, in JanuaryAustralian OpenWill be held on the Australian hard court in the Southern Hemisphere, but when it ends, it will move to the Northern Hemisphere, and in February the battleground will move to indoor courts around the world.Shimadzu All Japan Indoor Tennis ChampionshipsWas held in March and then in September4 major competitionsOf the final round of the yearUS OpenAfter that, a series of games will be held on the indoor court from October when it gets cold until the final round of the annual tour. Even in soft tennis, the indoor season starts in November and the final race in April. The main indoor competitions in soft tennis are the Japan League, (HTB Cup International Sapporo Indoors), SHOWACUP Tokyo Indoor All Japan Soft Tennis Tournament (Miyazaki Indoor), All Japan Indoor Championships, (formerly All Japan Selected Soft Tennis Kumamoto Tournament, commonly known as " Kumamoto Indoors”), All Japan Women's Select Soft Tennis Tournament (starting order). The biggest and most prestigious of these is the first week of FebruaryOsaka City Central GymnasiumIt is an all-Japan indoor championship that will be held in Japan (it is also called "Osaka indoor" as opposed to "Tokyo indoor" at the SHOWACUP Tokyo indoor all-Japan soft tennis tournament held a few weeks before).

Artificial grass coat with sand

A widespread coat in Japan and Australia (there have been a decrease since the 2000s due to the guidance of the association) and New Zealand. It is a fairly rare surface in other areas. In addition to Sumitomo Rubber Industries / Sumitomo Rubber Industries' omni coat, there are Toa Road's Spak Sand, Mitsubishi Kasei's Diamond Arena, Tokyo Wellness's Karuna 21, Daika Sangyo's Bio Turf, and Sekisui's resin sand glass. The artificial grass is sanded to reduce friction appropriately. It spread rapidly in the 1990s, and public coats in Japan were mostly artificial sand with sand.

The all-weather type of tennis court (which can be played even if it rains a little) is for sale, and the ball legs do not play slower than hard in hard tennis. Soft tennis is slower than clay and has a slightly lower trajectory. It surpasses other surfaces in that it is not affected by the weather, so it can be said that it is an all-weather coat in the true sense. In rainy Japan, the burden of running the tournament, which was a headache, has been dramatically reduced. Moreover, the coexistence of hard tennis and soft tennis is a peculiar situation in Japanese tennis, but it also exists as a compromise point (hard players prefer hard, soft tennis players tend to prefer clay, and often conflict). However, there are clay tennis courts and sand-filled artificial grass courts for soft tennis. Conventionally, used sand-containing artificial grassIndustrial wasteThen it became one of the environmental problems. However, in recent years, some companies (such as Tokyo Wellness) who fully recycle used sand-containing artificial grass have also appeared. However, players who grew up only with sand-containing artificial grass do not pass at all in the world, and the organization that is focusing on training junior hard tennis is trying to raise the bottom of the junior from the environmental aspect in order to raise the juniors who fight in the world. ing. In fact, it is a prestigious tennis player and many professionals have produced it.Shonan Institute of Technology High School,Yanagawa High School,Sonoda Gakuen Junior and Senior High School,Keio University,Waseda University,Asia University,Ebara Shonan Sports CenterApproximately 8% of Sakurada Club's tennis courts are hard courts, more than 1% are clay courts, and the proportion of artificial grass with sand only constitutes less than 1%.

footnote

[How to use footnotes]
  1. ^ a b c d e f "Number" 869 (January 2015, 1 issue)
  2. ^ "Nadal mentions the burden of hard courts on athletes' bodies”. AFP (July 2019, 3). 2019/3/16Browse.

 

 

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