Four more spots are up for grabs in the Champions League quarterfinals. If these teams are to make it out of the round of 16, these are the players that will need to shine in this week's matches.
Here are the key players to keep an eye on:
Juventus — Leonardo Bonucci
Max Allegri's gamble in the first leg to banish Bonucci to the stands didn't come back to bite him. It seems the 29-year-old got the message, though, and has returned to his usual dominant self in Juventus' back line. With Porto looking to overturn a 2-0 first leg, a strong defensive unit is paramount. Porto couldn't score in the first leg at home, now they'll have to try and do it on the road ... and with Bonucci back in the lineup. Good luck.
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Porto — Francisco Soares
Porto just keep finding goal-scorers, don't they? Soares arrived from Vitoria Guimaraes SC and all he's done is score in every Primeira Liga appearance he's had. That's nine goals in six matches! Now, seeing that Porto need goals in a big way, why not give the guy a chance to shine in the Champions League? Playing the hot hand could be exactly what Porto need to push Juventus.
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Leicester City — Riyad Mahrez
Jamie Vardy's second-half goal and Kasper Schmeichel's heroics between the sticks gave Leicester a foothold in this tie, which the Foxes trail 2-1. Mahrez didn't have a great shift in the first leg, which he'll need to remedy on Tuesday. With Claudio Ranieri gone and Craig Shakespeare confirmed as the manager (at least through the rest of this season), Leicester have played with renewed intensity and desire. They'll need Mahrez at his creative best to unlock Sevilla and try and win the tie.
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Sevilla — Steven N'Zonzi
Sevilla have struggled somewhat since their last meeting with Leicester. The Foxes still need a goal to win the tie, but they have the luxury of having scored an away goal. Sevilla getting one of their own at the KP Stadium, where Leicester haven't lost in European competition yet this term, would be huge. Marauding around the middle of the pitch is where N'Zonzi should again feature for Sevilla. He'll be tasked with keeping Leicester at bay, but he has the chops to ignite the attack, too.
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Atletico Madrid — Koke
Atletico have a commanding 4-2 lead after the first leg against Bayer and will be playing this tie at home. With Gabi suspended, Nicolas Gaitan might work his way back into the lineup. Still, missing Gabi in the middle of the pitch is a big blow for Los Colchoneros, who will likely be under siege from a Bayer side that needs goals in a bad way. Koke and his midfield partners will need to be active and ready to break up the German club's attacks.
Bayer Leverkusen — Chicharito
The Werkself mustered 15 shots in the first leg but only had two goals to show for it. Kevin Kampl and Chicharito were responsible for five apiece, and they'll need to hit with a higher conversion rate to overturn their 4-2 deficit. Chicharito has a knack for scoring goals in bunches, though. He'll be counted upon to try and dig Bayer out of their hole and pull off the upset.
Monaco — Kylian Mbappe
Falcao, who has enjoyed a resurgent season with Monaco, faces a fitness battle ahead of the clash against Man City. Losing him would be a big blow, but luckily Monaco have an admirable deputy. Mbappe has been in outstanding form for Monaco and the 18 year old has three goals in his last two Ligue 1 matches. Facing a 5-3 deficit, Monaco will need to score at least a pair to advance. Their home record for the Ligue 1 leaders is astounding, though. They've lost just once at home with a goal differential of +57. A 5-3 hill might seem steep to climb, but they're more than equipped to pull it off.
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Manchester City — John Stones
Stones had a very forgettable first leg with two errors contributed to two of Monaco's goals. He atoned with a goal of his own, but more shoddy defensive play is the last thing the Citizens need. Holding onto a 5-3 lead means they can play conservatively and still advance. Another gift (or two) from City's young center back would put Monaco right back into the tie, though.