Vasiļjevs debuted on the ISU Junior Grand Prix circuit in 2013, placing 7th in Riga, Latvia and 10th in Gdańsk, Poland. He was named in Latvia's team to the World Junior Championships, held in March 2014 in Sofia, Bulgaria. Ranked 11th in the short program, he qualified for the free skate where he placed 7th, pulling him up to 8th overall.