How Novak Djokovic was defaulted from the 2020 US Open

What rules did Novak Djokovic break that caused the top-ranked player's removal from the US Open? from www.espn.com - TOP https://ift....

What rules did Novak Djokovic break that caused the top-ranked player's removal from the US Open?

from www.espn.com - TOP https://ift.tt/3lVJyjn