a polo field requires careful and constant grounds maintenance to keep the surface in good playing condition. During half-time of a match, spectators are invited to go onto the field to participate in a polo tradition called "divot stamping", which was developed not only to help replace the mounds of earth (divots) that are torn up by the horses' hooves, but also to afford spectators the opportunity to walk about and socialise. Contemporary sport Polo is played professionally in many countries, notably Argentina, Australia, Brazil, Canada, Chile, Dominican Republic, France, Germany, Iran, India, New Zealand, Mexico, Pakistan, Jamaica, Spain, South Africa, Switzerland, the United Kingdom, and the United States, and is now an active sport in 77 countries. Although its tenure as an Olympic sport was limited to 1900–1939, in 1998 the International Olympic Committee recognised it as a sport with a bona fide international governing body, the Federation of International Polo. The World Polo Championship is held every three years by the Federation. Polo is unique among team sports in that amateur players, often the team patrons, routinely hire and play alongside the sport's top professionals. Some of the most important tournaments, at club level, are Abierto de Tortugas, Abierto de Hurlingham and Abierto Argentino de Polo, all of them in Argentina (la Triple Corona). East and Southeast Asia Polo has been played in Malaysia and Singapore, both of which are former British colonies, since being introduced to Malaya during the late 19th century. Royal Johor Polo Club was formed in 1884 and Singapore Polo Club was formed in 1886. The oldest polo club in the modern country of Malaysia is Selangor Polo Club, founded in 1902. It was largely played by royalty and the political and business elite. Polo was played at the 2007 Southeast Asian Games, 2017 Southeast Asian Games and 2019 Southeast Asian Games. Nations that competed in the tournament were Indonesia, Singapore, Malaysia, Thailand and Philippines (2007), Brunei, Malaysia, Singapore and Thailand (2017) and Indonesia, Brunei, Philippines and Malaysia (2019). The 2007 tournament's gold medal was won by the Malaysian team, followed by Singapore with silver and Thailand with bronze while the 2017 tournament's gold medal was won by Malaysia, followed by Thailand with silver and Brunei with bronze. The 2019 tournament's gold medal was won by Malaysia, followed by the Philippines with silver, and Brunei receiving bronze. The recent resurgence in south-east Asia has