Petrescu signed for Sheffield Wednesday in 1994 from Genoa, after a successful 1994 World Cup for Romania. After one season at Hillsborough, he signed for Chelsea and featured prominently there for the next five years. During his term at Chelsea, he was a member of the teams which won the FA Cup in 1997 and the League Cup and Cup Winners' Cup (both in 1998). After falling out with Chelsea manager Gianluca Vialli after a defeat to Manchester United (a game in which he scored), Petrescu never played for the club again and was not even selected as a substitute for the 2000 FA Cup final against Aston Villa.