Here is one way to look at what Rafael Nadal, Novak Djokovic and the now-retired Roger Federer accomplished: The group known as the Big Three of men’s tennis accumulated so many Grand Slam titles that it seems unlikely anyone will reach the standards they set.

Reaction from social media and elsewhere after Novak Djokovic won a legal battle to stay in Australia and play in the Australian Open after his exemption from strict coronavirus vaccine rules was questioned.

Serbia's Novak Djokovic hits a backhand return to Canada's Milos Raonic during their fourth round match at the Australian Open tennis championship in Melbourne, Australia, Sunday, Feb. 14, 2021. For anyone curious about the severity of his injury, he put it into context after qualifying for the Australian Open quarterfinals for the 12th time. The eight-time Australian Open champion planned to spend most of the next two days recovering ahead of his quarterfinal against sixth-seeded Alexander Zverev. “If you’re here, it’s for a reason - there’s no doubt about it,” Dimitrov said after his 6-4, 6-4, 6-0 win. AdAnd not since Patrick McEnroe — John’s brother — in 1991 has a man ranked as low as 114th made it to the Australian Open quarterfinals.

Marketa Vondrousova of the Czech Republic smashes the ball to Taiwan's Hsieh Su-Wei in front of rows of empty seats during their fourth round match at the Australian Open tennis championships in Melbourne, Australia, Sunday, Feb. 14, 2021. The Australian Open continues but without crowds after the Victoria state government imposed a five-day lockdown in response to a COVID-19 outbreak at a quarantine hotel. (AP Photo/Andy Brownbill)MELBOURNE – Hey, Australian Open TV viewers: The crowd's loud clapping and mid-match chatter you hear on the telecasts are not real. It just happened here.”Aslan Karatsev is a 27-year-old Russian who is ranked 114th and needed to go through three rounds of qualifying just to get into the main draw at the Australian Open. And not since Patrick McEnroe — John's brother — in 1991 has a man ranked as low as 114th made it to the Australian Open quarterfinals.