He instead started training for international sport events, but in 1989, when Fischer was eighteen, he had problems with both his kneecaps after a growth spurt as a youth: "I grew too fast and didn't stretch well." As a result he sat out the whole of the 1989 season and thought he might have to retire from the sport at his young age. However, in the 1990 season when he came back he found that he had become more powerful than before his injury, and in December 1990, he celebrated his first European cup victory in sprint in Hochfilzen. One week later he participated in his first world cup relay. He was soon rewarded B–status and because of success in the German Championship in 1992 he qualified for the world cup in Pokljuka in December 1992.