Serena Williams was only 21 when she was first named world No. 1 in singles by the Women’s Tennis Association (WTA) in 2002. Since then, Williams has repeated the feat no fewer than eight times, spending a total of 319 weeks as world No. 1. She holds a total of 39 Grand Slam titles, 23 of them for Grand Slam singles. To many tennis commentators and players, Serena Williams is quite simply the greatest female tennis player of all time. But Williams’ journey to the top was not an easy one, ...