He only played 9 times (scoring 5 goals) in Serie A in 2002–03 season due to injuries in August and February, as the team managed a second-place finish in the league. Kallon returned to the side in May after Gabriel Batistuta was injured in April. He also played both legs of the 2002–03 UEFA Champions League semi-final against A.C. Milan as Batistuta was unable to register. He played in both games as a second-half substitute, for Álvaro Recoba and Hernán Crespo respectively.