Guillermo Tomasevich Castañeda (born March 20, 1987) is a Peruvian footballer who plays as a centre forward.
[1] In January 2009 Tomasevich joined Cusco giants Cienciano for the start of the 2009 season.
[1] He made his Peruvian First Division debut that season on 11 April 2009 away to Alianza Lima.
[3] Already down two goals, manager Julio Cesar Uribe allowed Tomasevich to enter the match in the 75th minute, but eventually it finished in a 2–0 win for Alianza Lima.
[3] In his seventh league match, Tomasevich scored his first goal in the Descentralizado on 9 August 2009 away to Alianza Atletico.