LONDON (AFP) - Amir Khan believes Britain's boxers can win eight medals at the Beijing Olympics. Britain will have eight fighters in China, their highest number fielded since Barcelona in 1992, and Khan believes that all of them are capable of success. Khan, the Commonwealth lightweight champion who won a silver at the Athens Games four years ago, said: "We have eight boxers going out there and we have a chance to bring back eight medals. "Every one of these boys is a great fighter. They are all capable and all they have to do is to stay focused."Khan shot to fame after winning a silver medal at the Athens Games at the tender age of 17.He still regards his Olympic medal as his greatest achievement and is well aware of the potential rewards that are on offer should any of the boxers shine in Beijing. "Winning the silver medal changed my life and I think it can do the same for these guys. It made me what I am today," he said. "Winning a medal can change their whole lives personally and financially, so it's going to be a big boost for them and their families." Khan singled out British lightweight star Frankie Gavin as the British team's best medal prospect. The Birmingham-based southpaw is current world champion after defeating Italy's Dominico Valentino on points in the final in Chicago last November. Khan is happy to give advice to his compatriots about what to expect in Beijing. "I see myself as a bigger brother to the boys sometimes. I've been there, I've seen it, I've experienced it all so I'm going to give all the advice I can because I want these guys to come back with medals and do Britain proud," he said.