 The two made their junior international debut in October 2003, placing tenth at the Junior Grand Prix event in Zagreb, Croatia.Ranked 14th in the compulsory dance, 9th in the original dance, and 11th in the free dance, Hájková/Vincour finished tenth overall at the 2005 World Junior Championships in Kitchener, Ontario, Canada.Hájková/Vincour moved up to the senior ranks the following season.