D. Černý has officiated 173 matches on record, averaging 4.1 cards and 19.3 fouls per game — a firm official. A player is dismissed roughly once every 6 games, and the spot is pointed to 0.28 times per match. Home teams win 37% of matches under him, drawing 25% and losing 38%. Most active in the Chance Liga (120 matches). 37% of his bookings come after the 75th minute, with the first card around the 38'. He cards more than 31% of Chance Liga 2025/2026 referees.