 Fearing being drafted by the Italian army, in 1936, he returned to Argentina, where he played for Racing Club de Avellaneda and, again, Estudiantes de La Plata.He retired at the end of the 1939 season.Guaita was one of twelve Argentine players to represent both Argentina (four caps, one goal) and Italy (ten caps, five goals) at national level, before the practice of playing for more than one national team was banned.