Information: - The Association of Tennis Professionals (ATP) World Tour is the elite professional tennis circuit organised by the ATP. The 2009 ATP World Tour calendar comprises the Grand Slam tournaments (supervised by the International Tennis Federation (ITF)), the ATP World Tour Masters 1000, the ATP World Tour 500 series, the ATP World Tour 250 series, the ATP World Team Championship, the Davis Cup (organized by the ITF), and the ATP World Tour Finals. Also included in the 2009 calendar is the Hopman Cup, which does not distribute ranking points, and is organised by the ITF. - The 2009 BCR Open Romania was a tennis tournament played on outdoor clay courts . It was the 17th edition of the event known that year as the BCR Open Romania , and was part of the ATP World Tour 250 Series of the 2009 ATP World Tour . It was held at the Arenele BNR in Bucharest , Romania , from September 21 through September 27 , 2009 . - The International Tennis Federation (ITF) is the governing body of world tennis, wheelchair tennis, and beach tennis. It was founded in 1913 as the International Lawn Tennis Federation by twelve national associations, and as of 2016, is affiliated with 211 national tennis associations and six regional associations. - The Danube (, known by various names in other languages) is Europe's second-longest river, after the Volga River, and also the longest river in the European Union region. It is located in Central and Eastern Europe. - The Arenele BNR are a complex of tennis venues located in Bucharest, Romania. They host the Romanian Open, also known as the BRD Nstase iriac Trophy (part of the ATP World Tour and played annually around the end of April), and the Bucharest Open (part of the WTA Tour and played annually at the beginning of July). - Felt is a textile that is produced by matting, condensing and pressing fibers together. Felt can be made of natural fibers such as wool, or from synthetic fibers such as petroleum-based acrylic or acrylonitrile or wood pulp-based rayon. Blended fibers are also common. - The ATP World Tour Finals (also known as the "Barclays ATP World Tour Finals" for sponsorship reasons) is a professional men's tennis tournament played on indoor hard courts and is held annually in November at the O2 Arena in London, United Kingdom. The ATP World Tour Finals are the season-ending championships of the Association of Tennis Professionals (ATP) World Tour, featuring the top eight singles players and doubles teams of the ATP Rankings. The tournament was first held in 1970. - The ATP World Tour 250 Series is the newest series for tennis tournaments of the Association of Tennis Professionals (ATP) from the 2009 ATP World Tour. It is the lowest tier of events on the tour, and is a continuation of the ATP International Series. - Dambovia is a river in Romania. It has its sources in the Fgra Mountains, on the Curmtura Oticu. The upper reach of the rivers, upstream of the confluence with the Boarcu River is also known as Izvorul Oticului River or Oticu River. - The Hopman Cup is an annual international eight-team indoor hardcourt tennis tournament held in Perth, Western Australia in early January (sometimes commencing in late December) each year, which plays mixed-gender teams on a country-by-country basis. - Bulgaria (tr. '), officially the Republic of Bulgaria (tr. '), is a country in southeastern Europe. It is bordered by Romania to the north, Serbia and Macedonia to the west, Greece and Turkey to the south, and the Black Sea to the east. With a territory of , Bulgaria is Europe's 16th-largest country. - Romania is a sovereign state located in Southeastern Europe. It borders the Black Sea, Bulgaria, Ukraine, Hungary, Serbia, and Moldova. It has an area of and a temperate-continental climate. With 19.94 million inhabitants, the country is the seventh-most-populous member state of the European Union. The capital and largest city, Bucharest, with its 1,883,425 inhabitants is the sixth-largest city in the EU. - The Davis Cup is the premier international team event in men's tennis. It is run by the International Tennis Federation (ITF) and is contested annually between teams from competing countries in a knock-out format. It is described by the organisers as the "World Cup of Tennis", and the winners are referred to as the World Champion team. The competition began in 1900 as a challenge between Great Britain and the United States. By 2016, 135 nations entered teams into the competition. The most successful countries over the history of the tournament are the United States (winning 32 tournaments and finishing as runners-up 29 times) and Australia (winning 28 times, including four occasions with New Zealand as Australasia, and finishing as runners-up 19 times). The present champions are Argentina who beat Croatia to win the title for the first time in 2016. - The Association of Tennis Professionals (ATP) was formed in September 1972 by Donald Dell, Bob Briner, Jack Kramer, and Cliff Drysdale to protect the interests of male professional tennis players. Drysdale became the first President. Since 1990, the association has organized the worldwide tennis tour for men and linked the title of the tour with the organization's name. In 1990 the organization was called the ATP Tour, which was renamed in 2001 as just ATP and the tour being called ATP Tour. In 2009 the name was changed again and is now known as the ATP World Tour. It is an evolution of the tour competitions previously known as Grand Prix tennis tournaments and World Championship Tennis (WCT). - Tennis is a racket sport that can be played individually against a single opponent (singles) or between two teams of two players each (doubles). Each player uses a tennis racket that is strung with cord to strike a hollow rubber ball covered with felt over or around a net and into the opponent's court. The object of the game is to play the ball in such a way that the opponent is not able to play a valid return. The player who is unable to return the ball will not gain a point, while the opposite player will. - The International Series (known from 1990 to 1999 as the ATP World Series) was a series of professional tennis tournaments held internationally as part of the ATP Tour from 2000 to until 2008. - Bucharest is the capital and largest city of Romania, as well as its cultural, industrial, and financial centre. It is located in the southeast of the country, at , on the banks of the Dambovia River, less than north of the Danube River and the Bulgarian border. - The ATP World Tour 500 series (previously known as the Grand Prix Super Series, ATP International Series Gold and the Championship Series) is the third highest tier of men's tennis tournament after the four Grand Slam tournaments, and the ATP World Tour Masters 1000. What is the relationship between '2009 bcr open romania' and 'brd nastase tiriac trophy'?
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