The ATP Challenger Tour has been an all-out battleground this year—here are five players who've risen up to the challenge.

The Serb has a chance to clinch year-end No. 1 for a record seventh time this week, depending on his and Daniil Medvedev’s results in Paris.

Jordan, Maxime and Andreas all needed final-set tiebreakers and saved a combined nine match points on a wild Tuesday afternoon.

If the 18-year-old can survive this tough test against the Hungarian, he has a legitimate chance to capture his second ATP title heading into the US Open.

It depends whether you value quantity or quality.

While Novak Djokovic is a heavy favorite, Marton Fucsovics has stolen a set in each past encounter.

Garin, Khachanov, Samsonova, Fucsovics, Golubic: watch out for this quintet.

The eighth-ranked Russian put another jewel in his ATP 500-level crown, while the 18-year-old Dane won her first WTA tour title.

After sharing a tight contest at Roland Garros last year, Rublev and Fucsovics will now meet for the ABN AMRO World Tennis Tournament trophy on Sunday.

Giving his all inside John Cain Arena versus 55th-ranked Marton Fucsovics, the 35-year-old Swiss lost a match by the remarkable score of 7-5, 6-1, 4-6, 2-6, 7-6 (9).