The Champions League quarter-finals reach their boiling point this week with four massive second-leg fixtures. With the semi-finals in sight, there is absolutely no room for error. Here is your definitive preview of this week's deciders and exactly what each team needs to do to survive.

Tuesday, April 14

Atlético Madrid vs. FC Barcelona: Atlético Madrid hosts FC Barcelona, carrying a 2-0 lead from the first leg after Diego Simeone orchestrated a tactical masterclass at the Camp Nou. Atlético Madrid will advance with a win, a draw, or a one-goal loss, relying heavily on their defensive structure to frustrate the visitors. Barcelona, with a mountain to climb, must win by exactly two goals simply to force extra time, or secure a spectacular victory by a margin of three or more goals to advance outright in regulation.

Liverpool FC vs. Paris Saint-Germain: Over at Anfield, Liverpool faces Paris Saint-Germain, trailing 3-1 after being outgunned at the Parc des Princes. However, Anfield on a European night is a different beast entirely. Liverpool requires another famous European comeback, needing to win by exactly two goals to force extra time, or by three goals to advance directly to the semi-finals. PSG holds all the cards and will progress if they win, draw, or suffer a narrow one-goal defeat.

Wednesday, April 15

Arsenal FC vs. Sporting CP: The action continues as Arsenal FC welcomes Sporting CP to the Emirates Stadium after securing a precious, hard-fought 2-1 victory in Lisbon. Mikel Arteta’s men are in the driver's seat and just need to avoid defeat; a win or a draw of any kind will see the Gunners safely through to the next round. Sporting CP must take the game to Arsenal, requiring a one-goal victory to take the tie to extra time, or a win by two or more goals to complete the upset and advance outright.

Bayern Munich vs. Real Madrid: Finally, Bayern Munich clashes with Real Madrid in a heavyweight thriller that hangs beautifully in the balance following a 2-2 draw at the Bernabéu. With the away goals rule no longer in play, this is a straight shootout at the Allianz Arena where the equation is incredibly simple for both European giants: winner takes all. Whoever wins the match advances, and if the game ends in a draw after 90 minutes regardless of the scoreline, the tie will go to extra time and potentially a penalty shootout.