Career
Juniors 1 Roger Federer in the Sunshine Cup. He reached as high as Number. 19 in the junior world singles rankings (and Number 16 in doubles).
Pro tour In 1999 he made an appearance for the Czechoslovakian Republic team, in a World Group play-off tie against Uzbekistan.
He defeated Oleg Ogorodov in the fourth rubber, to help the Czechs secure a clean sweep. Kralert qualified for his only Grand Slam tournament in 2000, at the United States Open.
Singles: (2).