
Silver lining —
This is the trophy the last 16 in the Champions League are all playing for -- but who will hoist it after the final in Milan next year?

Messi business —
Barcelona and talisman Lionel Messi take on Arsenal after the Gunners produced a great escape from the group stage.

Triple treat —
Nobody did more for Arsenal to set up that Barcelona date than Olivier Giroud, whose hat-trick saw off Olympiakos in the crucial final group game. Arsenal last failed to reach the knockout stages of the competition in 1999.

Pog in the machine —
France international Paul Pogba is at the heart of a fast-improving Juventus team who will be hoping to put paid to Bayern Munich's chances.

Lethal Lewa —
But runaway Bundesliga leaders Bayern have prolific striker Robert Lewandowski in their lineup -- a danger to any defense. Bayern is coached by Pep Guardiola, who led Barcelona to two Champions League triumphs in 2009 and 2011.

Zlat's the man —
Nobody is more important to Paris Saint-Germain than Zlatan Ibrahimovic, whose side meets Chelsea for the second season running.

Happy Blues? —
Chelsea has so far found the Champions League a happier experience than the Premier League, and will be looking for revenge against PSG after last season's defeat at the same stage of the competition. Jose Mourinho's side is struggling in the EPL, currently languishing in the bottom half of the table.

Repeating the trick? —
Alessandro Florenzi of AS Roma made headlines in the group stage when he scored against Barcelona in spectacular fashion. Can he do it again against Real Madrid?

Ron target —
Or will Real Madrid's prolific Portuguese forward Cristiano Ronaldo add to his rich haul of Champions League goals?

Whirring Dynamo —
Oleh Husev of Dinamo Kiev celebrates after scoring in the group stage match against Porto. Now the Ukrainians face big-spending Manchester City.

Sterling work —
City's options in attack include Raheem Sterling, who joined from Liverpool in July.

Wolf at the door —
Naldo, of Wolfsburg, celebrates with fans after the 3-2 victory over Manchester United that eliminated the English club from the Champions League.

Famous Belgians —
Belgian club Gent, the surprise package of the tournament so far, now has the challenge of getting past Wolfsburg.

Portuguese pride —
Benfica, seen here celebrating a goal against Galatasaray in the group stage, takes on Zenit St Petersburg next.

Dutch courage —
Netherlands side PSV Eindhoven takes on Atletico Madrid as it looks to continue a fine run of form.