From UEFA.com:

2006 - 2007 UEFA Champions League
First knockout round
Team named first at home in first leg

FC Porto (POR) v Chelsea FC (ENG)
Celtic FC (SCO) v AC Milan (ITA)
PSV Eindhoven (NED) v Arsenal FC (ENG)
LOSC Lille Métropole (FRA) v Manchester United FC (ENG)
AS Roma (ITA) v Olympique Lyonnais (FRA)
FC Barcelona v Liverpool FC (ENG)
Real Madrid CF (ESP) v FC Bayern München (GER)
FC Internazionale Milano (ITA) v Valencia CF (ESP)

UEFA Details