Richardson is edged out by Tyree Washington in 1997 (Getty)
Retired GB sprinter Mark Richardson has revealed he is not surprised by Antonio Pettigrew's admission of drug-use.
Richardson was part of the British quartet who came second to the USA team featuring Pettigrew in the 4x400m at the 1997 World Championships in Athens.
He told BBC Radio Berkshire: "I can't say I'm shocked because we always had slight suspicions about the consistency of the American athletes.
"But it's in the past. There's nothing we can do about it to change things."
Richardson claimed the admission does not alter his disappointment at being beaten in the race.
"We came second and nothing's going to change that. If we get a gold medal, it'll be a hollow victory," he said.
"What difference does it make? Does it mean that we get to go up onto the rostrum and savour the moment? No. Does it mean that the race is going to be re-run and we come out victorious? No.
"It's just very disappointing when you know that you were trying to achieve the athletic feats that you have through hard work and endeavour, not using false means to assist you."