Martina Navratilova is an athlete.
The 1975 Federation Cup was the 13th edition of the most important competition between national teams in women 's tennis . The game that most people call tennis is the direct descendant of what is now known as real tennis or royal tennis ( which continues to be played today as a separate sport with more complex rules ) . Margaret Court ( née Smith ; born 16 July 1942 ) , also known as Margaret Smith Court , is a retired Australian tennis player and former world No. 1 . Martina Navratilova . Navratilova holds the records for most singles titles ( 167 ) and for most doubles titles ( 177 ) in the open era . 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 .