Information: - 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 Portugal Open (formerly named Estoril Open) was an ATP and WTA clay court tennis tournament in Portugal. The event took place at the sports complex of Jamor in Oeiras, of which Estoril Court Central is the most prominent show court. In 2015 the tournament was canceled due to lack of sponsorship. A new tournament, Millennium Estoril Open, was created in its place, moving from Oeiras to Cascais. The 2014 Portugal Open was the last edition. - A court is a tribunal, often as a government institution, with the authority to adjudicate legal disputes between parties and carry out the administration of justice in civil, criminal, and administrative matters in accordance with the rule of law. In both common law and civil law legal systems, courts are the central means for dispute resolution, and it is generally understood that all persons have an ability to bring their claims before a court. Similarly, the rights of those accused of a crime include the right to present a defense before a court. - The ATP Masters Series was a series of nine tennis tournaments that formed part of the men's Association of Tennis Professionals (ATP) tour, held annually throughout the year in Europe, North America. The tournaments were important for the top male players on the professional circuit as the series constituted the most prestigious tournaments in men's tennis after the four Grand Slam events. The events were known as the Championship Series, Single Week from 1990 to 1995, the Mercedes-Benz Super 9 from 1996 to 1999, the Tennis Masters Series from 2000 to 2004 and the ATP Masters Series until 2008. - Estoril Court Central is the main tennis court in Oeiras, Portugal. Built in 2005, it currently holds 10,000 spectators. It annually hosts the Portugal Open in May. - 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 2008 Estoril Open was a tennis tournament played on outdoor clay courts . It was the 19th edition of the Estoril Open , and was part of the International Series of the 2008 ATP Tour , and of the Tier IV Series of the 2008 WTA Tour . Both the men 's and the women 's events took place at the Estoril Court Central in Oeiras , Portugal , from April 14 through April 20 , 2008 . The men 's draw featured World No. 1 , reigning Wimbledon and US Open champion , Australian Open semifinalist Roger Federer , ATP No. 4 , Miami Masters winner and 2003 Estoril titlist Nikolay Davydenko , and Rotterdam semifinalist Ivo Karlovi . Other seeded players were Australian Open quarterfinalist and Adelaide runner - up Jarkko Nieminen , Rotterdam semifinalist Gilles Simon , Nicolas Mahut , Marc Gicquel and Michael Berrer . The women 's draw was headlined by Vina del Mar and Acapulco champion Flavia Pennetta , Auckland quarterfinalist Maria Kirilenko , and Antwerp runner - up Karin Knapp . Also present in the field were 2005 Estoril titlist Lucie Safaova , 2000 Estoril semifinalist Tathiana Garbin , Klara Zakopalova , Sofia Arvidsson and Camille Pin . - The ATP Tour is the elite tour for professional tennis organized by the Association of Tennis Professionals. The ATP Tour includes the four Grand Slam tournaments, the Tennis Masters Cup, the ATP Masters Series, the International Series Gold and the International Series tournaments. - The 2008 Sony Ericsson WTA Tour was the elite professional tennis circuit organized by the Women's Tennis Association (WTA) for the 2008 tennis season. The 2008 WTA Tour calendar comprises the Grand Slam tournaments (supervised by the International Tennis Federation (ITF)), the WTA Tier I-IV Events, the Fed Cup (organized by the ITF), the year-end championships, and the tennis event at the Beijing Summer Olympic Games. Given the information above, choose from the list below the object entity that exhibits the relation 'instance of' with the subject '2008 estoril open'. Choices: - administration - association - cliff - court - criminal - edition - event - federation - four - government - jack - law - millennium - name - nine - part - play - point - portugal - portugal open - professional - rights - season - september - series - show - single - strike - summer olympic games - tennis - tennis court - tennis tournament - textile - tournament - tribunal - wta tour - year
A:
portugal open