Sergey Shiryayev
Encyclopedia
Sergey Shiryayev is a Russia
Russia
Russia or , officially known as both Russia and the Russian Federation , is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects...

n cross country skier who has been competing since 2002. His best finish at the FIS Nordic World Ski Championships
FIS Nordic World Ski Championships
The FIS Nordic World Ski Championships have been held in various numbers and types of events since 1925 for men and since 1954 for women. Championship events include nordic skiing's three disciplines: cross-country skiing, ski jumping, and nordic combined...

 was 11th in the 15 km event (9.3 miles) at the 2007 event
2007 FIS Nordic World Ski Championships
The FIS Nordic World Ski Championships 2007 took place February 22 - March 4, 2007 in Sapporo, Japan. This was the second time this city has hosted these championships, doing so previously at the 1972 Winter Olympics, having been voted at the 43rd FIS World Congress in Portorož, Slovenia on June 6,...

 in Sapporo, but that result was declared null and void upon announcing Shiryayev's disqualification for doping
Doping (sport)
The use of performance-enhancing drugs in sport is commonly referred to by the term "doping", particularly by those organizations that regulate competitions. The use of performance enhancing drugs is mostly done to improve athletic performance. This is why many sports ban the use of performance...

 on EPO
Erythropoietin
Erythropoietin, or its alternatives erythropoetin or erthropoyetin or EPO, is a glycoprotein hormone that controls erythropoiesis, or red blood cell production...

 at the last day of the championships on March 4, 2007. His case was heard at the FIS Council meeting in Portorož
Portorož
- External links :**...

, Slovenia
Slovenia
Slovenia , officially the Republic of Slovenia , is a country in Central and Southeastern Europe touching the Alps and bordering the Mediterranean. Slovenia borders Italy to the west, Croatia to the south and east, Hungary to the northeast, and Austria to the north, and also has a small portion of...

 in May 2007, resulting in a two year suspension from the sport. Two other coaches also received sanctions from the Russian ski federation.

Shiryayev's best World Cup finish was third in a 30 km mixed pursuit event (18.6 miles) in Russia
Russia
Russia or , officially known as both Russia and the Russian Federation , is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects...

 in January 2010.

At the 2010 Winter Olympics
2010 Winter Olympics
The 2010 Winter Olympics, officially the XXI Olympic Winter Games or the 21st Winter Olympics, were a major international multi-sport event held from February 12–28, 2010, in Vancouver, British Columbia, Canada, with some events held in the suburbs of Richmond, West Vancouver and the University...

, he finished 31st in the 15 km event while not finishing the 50 km event (31.1 miles).
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