Five years ago, Adekoya secured both the women’s 400m hurdles and mixed 4x400m relay crowns at the Asian Games in Jakarta Palembang only to be found to have tested positive for banned steroid stanozolol a year later.

The Athletics Integrity Unit stripped Adekoya of her two golds from Jakarta Palembang 2018 and handed down a four-year doping ban.

Adekoya returned to athletics in July - one month after Naser had made her comeback after completing a two-year suspension for whereabouts failures.

It was a much-anticipated dual between the two returning athletes and it lived up to its billing in Hangzhou.

Running from lane eight, Adekoya, the Incheon 2014 champion, managed to maintain the lead when going around the final bend.

Naser, seeking to retain her title, mounted a fightback in the closing metres only for Adekoya to hold on for the victory in 50.66sec.

It was a Bahraini one-two with 2019 world champion Naser sealing silver in 50.92, while Malaysia's Vallabouy Shereen Samson claimed bronze in 52.58.

Bahrain had a great day on the track as Birhanu Balew produced a stunning final leg to win the men’s 10,000m title in a time of 28:13.62.

India picked up two medals, with Kumar Kartik and Gulveer Singh posting personal best times of 28:15.38 and 28:17.21 respectively.

China enjoyed a sprint double as Ge Manqi and Xie Zhenye captured the respective women’s and men’s 100m titles.

Ge edged Singaporean Veronica Shanti Pereira on the line to triumph in 11.23 before Xie clocked 9.97 to win gold to the delight of the home crowd.

China had already celebrated the success of Wang Qi who topped the men’s hammer throw standings with 72.94m.

Yousef Masrahi of Saudi Arabia came through to snatch men's 400m gold from Japan's Kentaro Sato in a thrilling finish.

There was just 0.02 between them as Masrahi reclaimed the title that he last won at Incheon 2014.

World silver medallist EJ Obiena of the Philippines broke the Asian Games men’s pole vault record with 5.90m to seal gold.

China strengthened their position at the top of the medals table, with nine further gold medals to move to 114 overall.

They continued their domination at the Hangzhou Olympic Sports Centre Aquatic Sports Arena as they hit the ground running in the diving competition after starring in swimming.

Quan Hongchan and Chen Yuxi struck women’s synchronised 10m platform gold with a brilliant score of 375.30 points before He Chao and Yan Siyu won the men’s synchronised 3m springboard title with 422.55.

The hosts also claimed the only gold in shooting with Zhang Bowen and Jiang Ranxin emerging victorious from the mixed team 10m air pistol final.

There was an all-Chinese table tennis final as Wang Chuqin and Sun Yingsha overcame Lin Gaoyuan and Wang Yidi 11-6, 11-8, 13-15, 11-4, 11-9 to secure mixed doubles gold.

Esports also delivered more success for China who defeated Hong Kong 2-0 in the Dream Three Kingdoms 2 final.

China's Zhang Zhizhen clinched the men's singles tennis title with a 6-4, 7-6 victory over Japan's Yosuke Watanuki.

Watanuki led 4-1 in the opening set and had a set point in the second but could not take his chances as Zhang triumphed 9-7 in the tie-break.

Chan Hao-ching and Chan Yung-jan secured the women's doubles crown with a 6-4, 6-3 success over Lee Ya-hsun and Liang En-shuo in the all-Chinese Taipei final.

Liang also lost the mixed doubles final with Huang Tsung-hao as India's Rohan Bopanna and Rujuta Bhosale came from behind to win a super tie-break to succeed 2-6, 6-3 (10-4).

Shih Pei-yu won the first roller skating gold when she beat fellow Chinese Taipei skater Yang Ho-chen to clinch the women's speed skating 10,000m point-elimination race crown.

South Korea's Jeong Byeong-hee claimed the men's 10,000m speed skating point-elimination race gold medal.

India came from behind to defeat Pakistan 2-1 in the men’s team squash final thanks to a stunning five-game victory for Abhay Singh over Noor Zaman.

Yoku Takahashi won Japan’s solitary gold today after securing the women’s triathlon title in a time of 2:01:04.

She overcame the Chinese challenge with Lin Xinyu and Yang Yifan coming home in 2:01:30 and 2:02:31 respectively to complete the top three.

Uzbekistan made their mark on the opening day of kurash action as they came away with a hat-trick of golds.

Artyom Shturbabin claimed the first of those when he defeated Iran’s Majid Vahid Barimanlou 8-0 in the men’s under-66 kilogram final.

An all-Uzbek women’s under-52kg gold-medal match saw Khilola Ortikboeva see off Sitora Elmurodova 10-0, while Mukhsin Khisomiddinov sealed the country’s third title when he defeated Turkmenistan’s Tejen Tejenov 5-0 in the men’s over-90kg final.