female number one tennis player
Serena Williams (USA) Not much to say here apart from 69 WTA titles including 21 grand slam titles where she won every grand slam for atleast 4 times. She is surely the greatest female tennis player of all times and still going strong at the age of 34. She has been in and around world rank.1 since 2002. 2015 was one of her best years winning the first three grand slams and currently ranks no.1 in women singles.