 Semjonovs was offered to join Daugava after his superb performance in the youth tournament "Pārceltuve" (he was selected best forward of the tournament).In Daugava he played from 1978 to 1989 (for one season he played with FC Karpaty Lviv during army duty), scoring 48 goals in 302 matches.His strong sides were speed and good technique however he often failed to score from very good opportunities.