Kammala jumla mai zuwa: A 1984 ya shiga cikin gasar zakarun duniya na matasa, inda ya kammala na huɗu ya sami matsayi a cikin ƙungiyar B ta ƙasa. A waccan shekarar, a cikin gasar slalom mai ban mamaki a San Siro, Milan, ya ba kowa mamaki ta hanyar doke kowane memba na ƙungiyar A. Bayan cin nasara uku a gasar cin kofin Turai, Tomba ya fara buga gasar cin kofin duniya a watan Disambar 1985 a Madonna di Campiglio, Italiya, kwanaki uku kafin ranar haihuwarsa ta goma sha tara. Watanni biyu bayan haka, a Åre, Sweden, ya ba da mamaki ga duniyar tseren kankara ta hanyar kammala na shida daga lambar lambar 62. Gwargwadon sa na farko ya zo ne a kakar wasa ta gaba a Alta Badia, Italiya a watan Disamba na 1986, kuma daga baya a wannan hunturu ya lashe tagulla a cikin babban slalom a
1987 Gasar Cin Kofin Duniya a Crans-Montana, Switzerland - ita ce kawai lambar da kungiyar Italiya ta samu a wannan Gasar Cin Kofin Duniya.