 He moved in 2007 to Red Star Belgrade, being forced to retire shortly after at the age of 28 due to heart problems.Born in Caldas da Rainha, Leiria District, Lucas began his career at Académica de Coimbra, making his professional debut during the 1999–2000 season (two matches in the second division) and also being loaned twice to amateur clubs, after which he returned to become an important first-team member.In 2004–05, Lucas signed with Boavista FC, where he consistently performed during three Primeira Liga seasons.