Fromberg was at the junior tournament of the Australian Open 1987 in both singles and doubles in the finals. The following year he became a professional tennis player and was able to win his first tournaments on the ATP World Tour in 1990 . He won in Båstad and Bologna that year and was in the final of ATP Singapore . He also won alongside Brad Pearce at the tournament in Schenectady . 1990 was his most successful year, in which he also achieved his highest ranking in the tennis world rankings with position 24 . In 1997 he won his last ATP tournament in singles at the Romanian Open , and in the same year he won his second double title with Wayne Arthurs in Kitzbühel . His highest ranking in the double world rankings was in 1998 with 159th place. His best single result at a Grand Slam tournament was reaching the round of 16 of the Australian Open in 1993 and 1998.