 He was runner-up to Paquillo Fernández at the 2008 IAAF World Race Walking Cup in Cheboksary in May, leading Russia to the team victory.A week prior to the 2008 Summer Olympics, his coach Viktor Chegin admitted that Borchin and fellow Russian walker Vladimir Kanaykin had failed an out-of-competition test in April that year, testing positive for the blood-booster EPO.However, Borchin dismissed the claims, saying he had not given a positive test and he not trained with or spoken to any of the other Russian walkers.