World number one advanced within three matches of completing the first calendar-year Grand Slam in 52 years

Fans return to Flushing Meadows after the 2020 tournament took place in front of empty stands has also made an impact

The Serb star rallied past Brooksby 1-6, 6-3, 6-2, 6-2 to face Italian Berrettini in a rematch of Wimbledon final

Victory against 20-year-old Brooksby would put the Serb into the quarters; only three more wins from a historic trophy

The Serb star rallied past Japan's Kei Nishikori 6-7 (4/7), 6-3, 6-3, 6-2 as he continues to chase the 21st Grand Slam

Serb five matches shy of completing Calendar Slam, winning record major titles after reaching US Open third round

The Serb star reached second round of the US Open by ousting Danish teen Holger Rune 6-1, 6-7 (5/7), 6-2, 6-1

The Serb begins his quest to complete a calendar-year Grand Slam and targeting a men’s record 21st Grand Slam title

Top-ranked Serbian says winning US Open to compete calendar slam will be greatest feat of his career

Serbian star has not dropped a Grand Slam match this year by winning the Wimbledon, Australian Open and French Open