U.S. Open champion Emma Raducanu had to work hard for her first win on the WTA Tour after her fairytale New York triumph as she recovered from a set down to beat world number 124 Polona Hercog 4-6 7-5 6-1 in the Transylvania Open in Romania on Tuesday.

Teen sensation Emma Raducanu battles past Polona Hercog to secure first WTA Tour win

Teenager Coco Gauff has captivated Wimbledon with her extraordinary talent and youthful exuberance but, as her beaten opponent said on Tuesday, she is "probably older in her head than the numbers show".

Wimbledon: 15-year old Cori Gauff fights back to defeat Hercog, reaches round of 16

In pics: Day 1 highlights of Australian Open

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Teen sensation Emma Raducanu battles past Polona Hercog to secure first WTA Tour win

Wimbledon: 15-year old Cori Gauff fights back to defeat Hercog, reaches round of 16

In pics: Day 1 highlights of Australian Open