Boxer Lauren Price, 25, has won gold at the European games in Minsk, Belarus.
Price, who is from Bargoed, beat Dutch middleweight Nouchka Fontijn with a split decision win to clinch the top medal.
Fontijn, who was reigning champion, beat Price in the semi-finals of the world championships last November.
Speaking about the win, Price told BBC Sport: “It has not even sunk in yet, but I am absolutely over the moon.
“I used my speed and counter-punched and stuck to my plan.
“I was quite calm and chilled, nothing to lose, everything to gain was my attitude.
“I would say this is the biggest win of my career to beat the world number one and Olympic silver medallist.
Price added: “I knew I had to take it to her to get the decision and I thought I won it clearly.
“I told myself I had nothing to lose and I went in with no pressure and it is an unbelievable feeling to have got the gold.”
The 25-year-old will now be setting her sights towards Olympic gold in Tokyo next year.
Price was one of two women chosen by GB Boxing to represent Team GB at the games, alongside 22-year-old welterweight Rosie Eccles, who trains with Price in Pontypool.
In total, 12 boxers from the UK competed at the games.
The European games, which were held between Friday, June 21 and Sunday, June 30, included 15 different sports, such as athletics, archery, beach football, karate, table tennis and wrestling, among others.
Team GB finished ninth on the overall medal table, earning six golds, nine silvers and eight bronze medals.
Russia topped the overall medal table, with host nation Belarus coming second and Ukraine finishing third.
In total, 50 nations from across Europe took part in what was the second edition of the games.