MUNICH, DEC. 12 -- Petr Korda hit the jackpot with his first tournament victory of the season.

One day after upsetting top-ranked Pete Sampras, Korda, of the Czech Republic, outlasted No. 2 Michael Stich in five sets today to win the Grand Slam Cup and tennis's richest prize of $1.625 million.

"I was playing tennis all night in my mind, I was dreaming of my match against Sampras," Korda said after his marathon 2-6, 6-4, 7-6 (7-5), 2-6, 11-9 win over Stich. "I woke up optimistic because I felt fitter than expected. I wasn't feeling great, but not that bad either."

The $6 million tournament is the richest in the world and invites 16 players with the best records in the four annual Grand Slam events -- the Australian, French and U.S. opens and Wimbledon.

By earning $812,500 as runner-up, Stich's total in three of the four Grand Slam Cups he has played is $3,262,500.

The 12th-ranked Korda, who also needed five sets in his upset of Sampras, had his best showing at a Grand Slam this year by reaching the quarterfinals of the Australian Open.

Drinking beer after the best and the most profitable week of his career, Korda said his doctor from Prague had flown in to treat his stiff arm and elbow.

"My father told me to be a good fighter on the court, never to give up and that's what I did," Korda said.

Although Korda spent eight hours playing tennis in a 24-hour span, Stich was just as weary. The German, who won last year's event, beat Stefan Edberg in five sets on Saturday and his stamina caved in first in the final.

"My legs just gave up," Stich said. "I had more right to be tired. He had a tough match yesterday, but that happens in every tournament."