This paper presents the results of a production experiment that examines the effects of stress on the realization of tonal events in the intonation of Greek. Words in three different stress categories - final, penultimate and antepenultimate stress - were examined in two different prosodic positions: at the edge of an intermediate phrase and in phrase medial position. The results show that stress position affect the alignment and scaling of tones at the edge of an intermediate phrase but not in phrase medial position. Moreover, a phrase final word showed considerably longer duration than the same word in phrase medial position.