Djokovic secured a 7-6, 1-6, 7-6, 4-6, 13-12 win in a match that lasted for more than four hours.
The pandemic forced officials to cancel the tournament for the first time since 1945.
Wimbledon should have been happening right now but was called off for the first time since 1945 because of the COVID-19 outbreak.
Johanna Konta was set to take part in the Tokyo Olympics but the showpiece event was postponed till 2021 in the wake of the pandemic.
Pandemic is normally on the list of unforeseen reasons for which insurers promise cover for cricket in India.
A BCCI official said that the market and the feasibility is something that must be taken into consideration before comparing Wimbledon to the IPL.
Tennis has been in lockdown since early last month and is not scheduled to return until July 13 at the earliest following the cancellation of Wimbledon for the first time since World War II.
The Championships 2020 will be cancelled due to public health concerns linked to the coronavirus epidemic.
All England Lawn Tennis Club officials had already ruled out the possibility of holding the tournament would not be played behind closed doors.
The 32-year-old said he was working on keeping a "positive spirit" and enjoying the family time with the tennis season thrown into chaos by the pandemic.
Halep captured her second career major with a 6-2, 6-2 victory, adding a maiden Wimbledon to her 2018 Roland Garros triumph.
While Serena was frustrated by the surprise setback, she took heart from her run to the final in just the fourth tournament of her comeback following daughter Olympia's birth in September.
Williams had hoped to equal Margaret Court's record of 24 Grand Slam singles titles by winning her first major prize since becoming a mother in September.
At a time when so many of her peers have long since retired, Serena is still pushing her body through the gruelling hours of training and practice.
Kerber, who had won 11 career titles compared to Serena Williams's 72, has not been afraid to make tough decisions.