Marat Mikhailovich Safin born January 27, 1980, in Moscow) is a ex-World No. 1 Russian ATP tennis player. He was at the time the youngest world no. 1 ever and the tallest. He is the older brother of current World No. 1 WTA player Dinara Safina. They are the first brother-sister tandem in tennis history to both achieve No. 1 rankings.
Safin began his professional career in 1997, and held the No. 1 world ranking for a total of 9 weeks between November 2000 and April 2001. He won his first Grand Slam title at the 2000 U.S. Open after defeating Pete Sampras, and won the 2005 Australian Open, defeating Australian Lleyton Hewitt in the final. Safin helped lead Russia to Davis Cup victories in 2002 and 2006. Despite his dislike of grass courts, he became the first Russian man to reach the semifinals of Wimbledon at the 2008 Wimbledon Championships. At the time of his final Grand Slam appearance at the US Open on 2 September 2009, Safin was No. 61 in the official world men's tennis rankings.
Source : Wikipedia.com