Rydz booked a spot in the semi-finals after a 6-2 victory over Danny Jansen. He will face Nathan Girvan in the last four, after Girvan whitewashed Man Lok Leung from Hong Kong.
Geert Nentjes continued his dream to say the Development Tour circuit farewell with a world youth title as he defeated Keane Barry 6-3. He takes on Josh Rock, who beat Dylan Slevin 6-4.
Results PDC World Youth Championship
Quarter-Finals
Callan Rydz (97.52) 6-2 (85.40) Danny Jansen
Nathan Girvan (89.28) 6-0 (83.15) Man Lok Leung
Geert Nentjes (94.70) 6-3 (86.41) Keane Barry
Josh Rock (99.12) 6-4 (88.41) Dylan Slevin
Semi-Finals
Callan Rydz v Nathan Girvan
Geert Nentjes v Josh Rock