Sergey Petrovich Alay (; born 11 June 1965) is a retired Belarusian hammer thrower, whose personal best throw is 82.00 metres, achieved in May 1992 in Stayki.
Achievements Representing 1993World ChampionshipsStuttgart, Germany 4th79.02 m 1995World ChampionshipsGothenburg, Sweden 6th76.66 m1996Summer OlympicsAtlanta, United States8th77.38 m
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