He is one of the fastest marathon swimmers in the world and was a pre-race favorite to qualify for the 2012 London Olympics 10K Marathon Swim.
Spyros rose to the occasion in Shanghai and will compete in the 2012 London Olympic 10K Marathon Swim by virtue of his gold medal victory in the 10K race at the 2011 FINA World Championships. He was nominated for the 2011 World Open Water Swimming Man of the Year.
- Silver 2009 Rome 5 km open water
- Gold 2011 Shanghai 10 km open water
- Silver 2011 Shanghai 5 km open water
European Championships (LC)
- Gold 2010 Budapest 5 km team
- Bronze 2010 Budapest 5 km individual
- Bronze 2002 Berlin 4×200 m freestyle
- Gold 2001 Tunis 1500 m freestyle
- Silver 2005 Almería 400 m freestyle
- Silver 2005 Almería 1500 m freestyle
- Bronze 2005 Almería 800 m freestyle