The former Gleniffer High School pupil, 21, grabbed gold in the men's team sprint, before following it up with silver in the keirin
After crashing in Saturday's keirin
semi-finals, Katy Marchant did not start the sprint qualifying and Sophie Capewell, the second British sprinter, was beaten by Spain's Helena Casas in the round of 32.
The 25-year-old Welsh track sprinter has taken a year off from racing after claiming silver medals in the keirin
and match sprint at Rio 2016.
WELSH rider Lewis Oliva was eliminated from the men's Keirin
event at the Track Cycling World Championships in Hong Kong.
King Kenny (left) bids to emulate Hoy's hat-trick of gold medals in Beijing eight years ago aiming to complete a sprint treble in the keirin
Just one rider per nation was permitted at London 2012 and Kenny won the selection nod ahead of Hoy, who claimed his sixth Olympic gold in the Keirin
Just 15 minutes later, James stepped up and celebrated an Olympic keirin
silver medal in Rio.
The gold came in Minsk at the 2013 Track World Championships, where she won the individual sprint and Keirin
titles, events she will contest in Brazil.
Chris Pritchard made headlines all over the world when he climbed into the stands at the Sir Chris Hoy Velodrome after his keirin
race and popped the question to his sweetheart Amanda Bell.
At the Indira Gandhi Sports Complex, Deborah clinched the women's elite sprint and women's elite keirin
. In sprint, she beat teammate Kezia Varghese, who finished second.
The 22-year-old won women's keirin
gold at the National Cycling Centre in Manchester on Sunday to add to her sprint, team sprint and 500 metres time-trial titles.
TEHRAN (FNA)- Iran's cyclist Mohammad Daneshvar won the gold medal in the men's keirin
at 2014 Incheon Asian Games.