The Dutch high seed beat Japan's second seed Yui Kamiji 6-3 6-2 in the ladies's match at the Louis Armstrong Stadium in what was a repeat of the gold medal match at the Tokyo Paralympic Games earlier this month.
"For a long time it wasn't possible because Wimbledon didn't have a singles event. For a few years now they've had it... it's just great to see the tour and the professionalism going up each year," De Groot instructed reporters.
"To be the first one to actually get that title is just so special. I don't think I will ever forget that."
Not lengthy after on Sunday, Australian high seed Dylan Alcott additionally accomplished a golden slam in his respective occasion, taking down Dutchman Niels Vink 7-5 6-2 in the wheelchair quad singles remaining.
Alcott is the first males's wheelchair tennis player to complete a golden slam.
Djokovic had been wanting to win a file twenty first grand slam title and complete the first males's calendar grand slam -- profitable the Australian Open, French Open, Wimbledon and US Open in the identical 12 months -- since Rod Laver in 1969.
Djokovic missed out on the alternative to win a golden slam when he was knocked out in the Olympic semis by eventual gold medal winner Alexander Zverev earlier than shedding the bronze medal match to Pablo Carreno Busta.