In a word, Arsenal.
Despite actually going and topping their group this season, Arsenal have received their traditionally difficult draw for the last 16, having been paired against German giants Bayern Munich in the first knockout phase.
That game, and the clash between PSG and Barcelona, are the two standout ties from the last 16 draw, which will also see Manchester City take on Monaco and Leicester City take on Europa League champions Sevilla.
Seeded group winners will be away in the round of 16 first legs on 14/15 and 21/22 February, and at home in the return matches on 7/8 and 14/15 March.
Champions League last 16 draw
Manchester City v Monaco
Real Madrid v Napoli
Benfica v Borussia Dortmund
Bayern Munich v Arsenal
Porto v Juventus
Bayer Leverkusen v Atletico Madrid
PSG v Barcelona
Leicester City v Sevilla
Europa League last 32 draw
Athletic Bilbao v APOEL
Legia Warsaw v Ajax
Anderlecht v Zenit St. Petersburg
Astra v Genk
Manchester United v St-Étienne
Villarreal v Roma
Ludogorets v Copenhagen
Celta Vigo v Shakhtar Donetsk
Olympiacos v Osmanlıspor
Gent v Tottenham
Rostov v Sparta Prague
Krasnodar v Fenerbahçe
Borussia Mönchengladbach v Fiorentina
AZ Alkmaar v Lyon
H. Beer-Sheva v Beşiktaş
PAOK v Schalke