In February the rapid surge in the number of infections prompted officials to postpone the championships from their original March 22-29 dates to late June.
The International Table Tennis Federation (ITTF) also announced rankings will be frozen as of March 20.
China’s Fan Zhendong beat the 15th seed 11-9, 11-7, 8-11, 11-4, 6-11, 11-7 to win the title on March 8.
Fan, who pocketed 14th men’s singles title on the ITTF World Tour, won the contest 11-9, 11-7, 8-11, 11-4, 6-11, 11-7 to complete a double for his country following the women’s singles crown.
Chen, world's number one, won 3-11, 11-7, 11-9, 11-7, 11-7.
19-year-old Mima won 11-6, 14-12, 11-0, 11-5, incredibly not losing a point in the third against three-time world champion Ding.
Ma, who has won previously in 2013, 2016, 2017, 2019, is the most successful men’s singles player in Qatar Open history.
In the men's competition, Sweden’s Jon Persson defeated Qatar's Ahmad Khalil Al Mohannadi 11-7, 11-8, 11-5, 11-2 in 15 minutes.
Ma Long called all members of the team present in Doha to discuss the current situation.
The Belarussian registered more points on Cassin’s serve and showcased his calmness to dictate the outcome of the match.
The team had in Doha, Qatar for the past week following the conclusion of the 2020 ITTF World Tour Platinum German Open in Magdeburg.
In the women’s event, the team to secure a precious place contrary to status was DPR Korea.
The annual celebration brought together players, coaches, special guests and ITTF staff and officials from all over the world.
The 30-year-old, nicknamed the 'Dragon', defeated Sweden's Mattias Falck 4-1 in the final.
The Qatar Table Tennis Association's success in hosting ITTF World Tour Platinum event lies in their competency backed by a team of hardworking professionals.