Sergey Yuryevich Shiryayev is a Russian cross-country skier who competed between 2002 and 2015. His best finish at the FIS Nordic World Ski Championships was 11th in the 15 km event at the 2007 event in Sapporo, but that result was declared null and void upon announcing Shiryayev's disqualification for doping on EPO at the last day of the championships on 4 March 2007. His case was heard at the FIS Council meeting in Portorož, Slovenia in May 2007, resulting in a two-year suspension from the sport. Two other coaches also received sanctions from the Russian Ski Federation.