Tennis is a sport played between either two players (singles) or two teams of two players each (doubles). Players use a stringed racquet to strike a ball, a hollow rubber sphere covered in felt, over a net into the opponent's court. Tennis used to be called lawn tennis to distinguish it from its predecessor real tennis (also known as royal tennis, court tennis or jeu de paume), a form of the game played indoors on a different kind of a court. Originating in England in the late 19th century, the game spread first throughout the English-speaking world, particularly among the upper classes. Tennis is played in the Summer Olympic Games and at all levels of society, by individuals of all ages many countries around the world. Its rules have remained largely unchanged since the 1890s. Along with its millions of players, tennis claims millions of people who follow the sport as spectators, being particularly interested in the four Grand Slam tournaments.
In tennis, a player uses different strategies that both enhance his own strengths and exploit his opponent's weaknesses in order to gain the advantage and win more points. Players commonly specialize in a certain style of play, focusing on what they do best as a means of beating their opponents. Based on their style, players generally fit into one of three types: baseliners, volleyers and all-court players. A baseliner plays from the back of the tennis court, around the baseline, preferring to trade groundstrokes rather than to come up to the net (except in certain situations). A volleyer tries to approach the net and hit volleys, putting pressure on the opponent. All-court players fall somewhere in between. A tennis player usually determines his/her strategies based on his/her weaknesses. For example, most players have a stronger forehand, therefore they will hit forehands "inside out" to their opponents.
Marat Safin; (born January 27, 1980) is a former Russian tennis player. Safin won two majors and reached the world number 1 ranking during his career. He was also famous for his emotional outbursts and sometimes fiery temper on court. Safin is the older brother of former World No. 1 WTA player Dinara Safina (Dinara Mikhailovna Safina) (Russian: Р”РёРЅР°СЂР° РњРёС…Р°Р№Р»РѕРІРЅР° РЎР°С„РёРЅР°), born April 27, 1986 in Moscow. They are the first brother-sister tandem in tennis history to both achieve No. 1 rankings.