Frances Tiafoe returns to the fourth round at the Miami Open presented by Itau on Monday night.

Frances Tiafoe celebrates a second-round victory over Miomir Kecmanovic in Miami.

Frances Tiafoe begins his Delray Beach Open title defence against Daniel Evans.

Frances Tiafoe (right) meets jockey Javier Castellano at the New York Open.

Frances Tiafoe meets American Ninja Warrior contestants (L-R) Noah Kaufman, Ian Dory and Joe Moravsky on Tuesday at the New York Open.

Frances Tiafoe chats with world-class jockey Javier Castellano on Tuesday at the New York Open.

Rafael Nadal pats the back of Frances Tiafoe, in his first major championship quarter-final, on Tuesday night at the Australian Open.

Frances Tiafoe celebrates his 21st birthday with a quarter-final berth at the Australian Open.

#NextGenATP American Frances Tiafoe is into the fourth round of a Grand Slam for the first time.

Frances Tiafoe strikes 56 winners past Andreas Seppi on Friday to reach the Australian Open fourth round.

Frances Tiafoe celebrates his upset win against Kevin Anderson on Wednesday at the Australian Open.

Alexei Popyrin and Frances Tiafoe sample Aussie 'Bush Tucker' ahead of the Sydney International.

Frances Tiafoe saves six of seven break points he faces to defeat Hubert Hurkacz on Tuesday.

Taylor Fritz and Frances Tiafoe, who are in different groups at the Next Gen ATP Finals, practised together ahead of the start of competition.

Taylor Fritz and Frances Tiafoe, both inside the Top 50 of the ATP Rankings, will compete at the 2018 Next Gen ATP Finals.

The 2018 Next Gen ATP Finals contenders speak to the media at the Red Bull Draw Party.

Liam Caruana, Andrey Rublev, Taylor Fritz and Alex de Minaur make up Group B at the 2018 Next Gen ATP Finals.

Stefanos Tsitsipas, Frances Tiafoe, Hubert Hurkacz and Jaume Munar are announced as Group A at the 2018 Next Gen ATP Finals.

Liam Caruana, Andrey Rublev, Frances Tiafoe and Alex de Minaur chat after learning their group placement for the Next Gen ATP Finals.

Jaume Munar and Frances Tiafoe will both make their Next Gen ATP Finals debuts this year.

Fast-improving Frances Tiafoe works hard to beat Canadian and 2013 finalist Milos Raonic on Thursday in Toronto.

Frances Tiafoe downs home hopeful Milos Raonic at the Rogers Cup to set a third-round meeting with Grigor Dimitrov.

Frances Tiafoe, the No. 13 seed, hit 10 aces to beat Hubert Hurkacz on Wednesday in Washington, D.C.

Frances Tiafoe sees off Romanian Marius Copil in straight sets in the opening round of the BB&T Atlanta Open.

Frances Tiafoe moved through to the third round of a Grand Slam for the first time in his career after defeating Julien Benneteau at Wimbledon on Thursday.