Modern pentathlete Jamie Cooke will face increased competition as he begins his bid to represent Great Britain in the Rio Olympic Games in 2016.
Cooke, 21, who grew up in Andoversford and went to Balcarras School, is in training for the opening World Cup of the year, which will be held in the United States later this month.
And joining Cooke, the Junior World Champion in 2011, are three teenagers who will make their World Cup debut in Palm Springs, California, from February 20 to 24.
Eighteen-year-old Jo Muir is joined in the eight-strong team by 19-year-olds Sam Curry and Joe Evans, and by Tom Toolis, aged 20.
Jan Bartu, Pentathlon GB Performance Director, said the first World Cup of the year will give the young athletes an early opportunity to show their mettle on a world stage.
Bartu said: "It's the right time in the Olympic cycle for these young athletes to go on the international circuit.
"It's is in line with our Rio plan, where we wanted to bring new talent on to the world class stage early in the Olympic cycle and see what they can do.
"It doesn't mean that we're not going to consider the more established athletes."
Cooke, a former member of Gloucester City Swimming Club, narrowly missed out on representing Team GB at the 2012 London Games.
He had achieved the Olympic qualifying standard by finishing fourth at the 2011 European Championships.
But he was eventually eclipsed by his team-mates, Nick Woodbridge and Sam Weale for an Olympic place.
The men's GB World Cup team are, for the men: Jamie Cooke, Sam Curry, Joe Evans, Tom Toolis. The women's team is made up of: Katy Burke, Heather Fell, Kate French, Jo Muir.
World Cup 1 runs from February 20 to 24; World Cup 2 is in Rio de Janeiro, Brazil, from March 22 to 24; World Cup 3 is held in Chengdu, China, from April 17 to 22, and World Cup 4 is in Budapest, Hungary, from May 8 to 12.
The European Championships are in Drzonkow, Poland, from July 11 to 17 and the World Championships are in Kaoshiung, Chinese Taipei from August 15 to 21.