In the 1997–98 season, Vlascenko finished second to Sven Meyer at the German Championships but went on to achieve his best ISU Championship results. Ranked fourth in the short and fifth in the free, he finished fourth overall at the European Championships in January 1998 in Milan, Italy. In April, he finished fifth at the 1998 World Championships in Minneapolis, USA (7th in qualifying, 6th in the short, and 5th in the free).