Martina Hingis plays tennis.
The 1998 Fed Cup was the 36th edition of the most important competition between national teams in women 's tennis . Leander Adrian Paes ( born 17 June 1973 ) is an Indian professional tennis player who is considered to be one of the best doubles and mixed doubles players of all time , having achieved a career Grand Slam in each discipline . Martina Hingis ( born 30 September 1980 ) is a Czechoslovak-born Swiss professional tennis player who spent a total of 209 weeks as the singles world No. 1 . The WTA Finals ( formerly known as the WTA Tour Championships short : WTA Championships ) , is a professional tennis tournament played annually at the end of the season for the top-ranked players on the Women 's Tennis Association ( WTA ) tour .