Alexander Viveros Sánchez (born 8 October 1977) is a Colombian retired footballer who played as a left back.
In 2000, he moved to Brazil and signed for Cruzeiro Esporte Clube, joining Fluminense FC in the following year but leaving the Rio de Janeiro side shortly after.
Viveros spent the 2001–02 campaign in Argentina with Racing Club de Avellaneda, appearing regularly as they won the Apertura tournament.
In January 2003, after a second spell with Cruzeiro, he moved to Portugal with Boavista F.C., playing 24 Primeira Liga matches in his only full season, with the Porto team ranking in eighth place.
Viveros gained 34 caps for Colombia during six years (two goals), being selected for the squad that appeared at the 1999 Copa América in Paraguay, and being a starter in an eventual quarter-final exit.