[1] He and his skating partner, Petra Pachlová, made their ISU Junior Grand Prix (JGP) debut in 2000.

In October 2003, Pachlová/Knoth won bronze at a JGP event in Ostrava, Czech Republic.

In January, they outscored Diana Janošťáková / Jiří Procházka to win the Czech national senior title and were selected to compete at the 2004 European Championships.

Making their senior international debut, they finished 19th at the European Championships, which took place the following month in Budapest, Hungary.

In March, they finished 11th at the 2005 World Junior Championships in Kitchener, Ontario, Canada.