It's not looking great for Basel, Beşiktaş, Paris and Porto, but history shows there is no such thing as a #UCL lost cause.
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First leg didn't go well for your team? Do not despair. Others have felt your pain and lived to fight again.
Paris 4-0 Barcelona
Barcelona 6-1 Paris
2016/17 round of 16
Barcelona became the first team to come from four goals down to win a UEFA Champions League tie last season – only the fourth time it's been done in any UEFA club competition tie! Paris's demolition of Luis Enrique's side in France was a shock; the comeback something out of this world, Sergi Roberto striking in added time to win the tie. "I told him: 'Get into the box! You're going to score!'" Neymar recalled. Sergi Roberto added: "I didn't know if I was dreaming ... I have never known cheers like that."
AC Milan 4-1 Deportivo La Coruña
Deportivo La Coruña 4-0 AC Milan
"Miracles often happen, things you might not rationally expect," said Depor coach Javier Irureta, holding on to faint hope ahead of the return leg, the Spanish team having been shredded after scoring first at San Siro. His charges were ahead on aggregate by half-time in the return, Walter Pandiani, Juan Carlos Valerón and Alberto Luque making it 3-0 – before substitute Fran González added a fourth. Having prayed for success, Irureta honoured a promised by taking the pilgrim trail to Santiago de Compostela.
Chelsea 3-1 Barcelona
Barcelona 5-1 Chelsea (aet)
Real Madrid 4-2 Monaco
Monaco 3-1 Real Madrid
Olympiacos 2-0 Manchester United
Manchester United 3-0 Olympiacos
2013/14 round of 16
Paris Saint-Germain 3-1 Chelsea
Chelsea 2-0 Paris Saint-Germain
Porto 3-1 Bayern München
Bayern München 6-1 Porto
Wolfsburg 2-0 Real Madrid
Real Madrid 3-0 Wolfsburg