Sérgio Paulo Marceneiro da Conceição (European Portuguese pronunciation: ; born 15 November 1974) is a Portuguese professional football manager and former player who mostly played as a right winger. Throughout his career, he played for ten teams in five countries. After gaining international recognition with Porto he switched to Italy, where he appeared for three clubs, winning domestic and European honours at Lazio. He amassed Primeira Liga totals of 97 games and 13 goals over four seasons, adding 136 matches and 13 goals in Serie A. Having won 56 caps for Portugal, he represented the nation at Euro 2000 and the 2002 World Cup, reaching the semi-finals of the former. In 2012, Conceição started working as a manager, leading five teams in his nation's top flight and Nantes in Ligue 1. He set the record for most games as manager of Porto, winning 11 honours including three league titles and the double in 2019–20 and 2021–22. After leaving in June 2024, he joined AC Milan in December that year.