#5 Sloane Stephens
At the 2013 Australian Open, Sloane Stephens aged just 19 made the semi-finals beating then World Number 3 Serena Williams along the way. She rose to World Number 11 by the end of the year. However, her form dipped and she remained outside the Top-25 until end of 2015.
In 2016, Sloane Stephens hired noted tennis coach Kamau Murray and under his guidance, she started re-discovering her form as she won 3 WTA titles at the start of the year. A foot injury derailed her progress as she was forced to be out of the game for 11 months.
In remarkable fashion, she didn't just make a comeback in the 2nd half of the 2017 season but won the US Open in an all-American clash against her good friend Madison Keys. Her efforts won her 'The WTA Comeback Player of the Year' Award.
In 2018, she won her first Premier Mandatory WTA Tournament in Miami, finished runner-up at Roland Garros, cracked the WTA Top-10 and finished runner-up at the WTA Finals.
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