Arsenal have drawn Bayern Munich in the last 16 of the Champions League.
Barcelona, winners in 2009 and 2011, travel to big-spending Manchester City, who finished second to Bayern in Group D after stunning the Germans with a 3-2 win in the last pool game.
Didier Drogba prepares to meet his old Chelsea team-mates as Galatasaray host the Blues in Istanbul and Greek champions Olympiacos entertain English opposition in the form of 2008 winners Manchester United.
Full draw:
Olympiakos v Manchester United
Bayer Leverkusen v Paris Saint-Germain
Schalke v Real Madrid
Zenit St Petersburg v Borussia Dortmund