"I can't describe what I'm feeling right now," said an emotional Stepanek.
"I came on the court with the mindset that I had to stay calm, hungry, motivated and concentrate... I was playing very aggressively today. I wanted to be the one who was active, who was controlling the game and it paid off."
The Czechs became the first country in 22 years to win the Davis Cup and Fed Cup in the same year but were pushed all the way by a Spanish team missing the talismanic Nadal.
Image: ITF President Francesco Ricci Bitti, right, presents Czech Republic's Davis Cup team with a trophy after their victory over Spain in their Davis Cup finals tennis match in Prague, Czech Republic, Sunday, Nov. 18, 2012.