PV Sindhu skipped the Malaysia Masters after taking part in the Premier Badminton League.
Pullela Gopichand said earlier badminton was remembered for men's singles players but Saina Nehwal changed the perception.
As for Delhi, this was their first victory in six matches in what has been a season to forget.
PV Sindhu defeated Nozomi Okuhara in straight games to clinch gold in the World Tour Finals.
PV Sindhu had lost in the semifinal of the All England Open and bagged a silver in the Commonwealth Games, earlier this year.
PV Sindhu beat Nozomi Okuhara in straight games to clinch her maiden BWF World Tour Finals title on Sunday.
BWF World Tour Finals, PV Sindhu vs Nozomi Okuhara: PV Sindhu became the first Indian to win the season-ending tournament.
PV Sindhu will face Nozomi Okuhara in the women's singles summit clash at the BWF World Tour Finals on Sunday.
PV Sindhu will take on Nozomi Okuhara in the women's singles final of the BWF World Tour Finals on Sunday.
PV Sindhu will now fight for the title with Japan's Nozomi Okuhara, to whom she had lost an epic World Championship final, last year.
BWF World Tour Finals: PV Sindhu sailed into the finals of the tournament with a comfortable win while Sameer Verma was knocked out by Shi Yuqi of China after an hour and eight minutes long battle.
PV Sindhu finished on top of her group after winning all her three matches.
PV Sindhu beat Tai Tzu Ying for the first time in seven meetings.
PV Sindhu will next play Beiwen Zhang of the United States in her second match of the BWF World Tour Finals.
Sania Mirza took to Twitter to share an adorable photo with PV Sindhu and Joshna Chinappa.
PV Sindhu and Carolina Marin face off in the Premier Badminton League season 4 opener on December 22.
Kidambi Srikanth, who had reached number one in world badminton rankings, has taken a dip since his loss in 2018 Commonwealth Games final.