The French call it 'La remontée'. It's derived from the Spanish 'La Remontada'. For us English speakers, it translates roughly as 'The Comeback'. Whichever language you say it in, it's a phrase that cruelly defines how Unai Emery is best remembered - or best forgotten - at Paris Saint-Germain. Shout it from the rooftops of the Champs-Élysées, Aston Villa are preparing to take on PSG in their Champions League quarter final in France on Wednesday. It's a PSG team being drooled over by many considered football observers. A PSG team who breathtakingly outplayed the Premier League's runaway leaders Liverpool over two legs to progress to the last eight last month. A PSG team who bookies have now installed ahead of Barcelona, Real Madrid and Bayern Munich as favourites to lift the prestigious trophy in Germany in May. There's some who feel Champions League new boys Villa might be in need of a 'remontée', 'remontada' or 'comeback' of their own in the return leg at Villa Park if Luis Enrique's team reach the levels they are capable of at the Parc des Princes. Yet for the passionate Parisians it's a phrase that has negative connotations, a phrase that's as damning as damning can be as far as Emery is concerned. For it captures the Spaniard's darkest hour in French football and arguably the most humiliating evening of his entire coaching career. Yes, even worse than being dumped out of the FA Cup by Stevenage. The comeback it refers to is from the last 16 of the Champions League back in March 2017. To this day it's the biggest deficit-destroying turnaround in the competition's illustrious history and Emery was on the receiving end of it. Emery's PSG were 4-0 up and seemingly coasting into the quarter final of that year's UCL thanks to an Angel Di Maria double and goals from Julian Draxler and Edinson Cavani in a rampant first leg at the Parc de Princes. Sacré bleu! It was not to be. Back at the Nou Camp, Barca, coached by - you guessed it - Luis Enrique, produced a recovery of Lazarus proportions. They won 6-1. SIX-ONE. To seal a mind-boggling 6-5 aggregate victory. Luis Suarez kickstarted the fightback early on, with a Laywin Kurzawa own goal late in the first half giving the Catalans more encouragement, before a Lionel Messi penalty made it 4-3 not long after the break. Cavani temporarily settled French nerves by giving PSG a two-goal cushion just after the hour mark. But it was Neymar's double on 88 and 90+1 minutes to level the tie that provided the defining image of a despairing Emery, head in his hands, a tortured fidget, apoplectic and astonished - and the killer blow hadn't yet been delivered. That came courtesy of the winner from substitute Sergi Roberto, five minutes into stoppage time. In the quarter-finals, Barcelona were subsequently knocked out by Juventus who would go on to lose the final to Real Madrid. Emery won three domestic trophies in France that season, but his PSG side finished runners up to champions Monaco in Ligue 1. Just over a year later, after exiting the competition at the last 16 stage again, Emery announced his decision to leave PSG at the end of the 2017-18 season. It was a campaign during which PSG celebrated winning France's domestic quadruple, including the league title, but the stigma of that unforgivable UCL throwaway remained. Valentin Jamin, a journalist with French radio station RMC, was in Birmingham this week, chatting to Birmingham Live and meeting with other Villa fans and watchers to get a feel for PSG's next opponents. Asked what Paris Saint-Germain fans think of Emery, it was Jamin who offered up the phrase 'La remontée'. "Unai Emery won the Ligue 1 championship one time and the Coupe de France , Cope de la Ligue and Trophee des Champions two times, but that is not how he is remembered," he explained. "In Paris winning those things is normal. It is 'La remontée, or what the Spanish call 'La Remontada' why he is remembered. For you, you say 'The Comeback'. PSG supporters cannot get past what happened against Barcelona. It may not be fair to remember him only for that moment, but it is that moment which will not go away when they think about Unai Emery." Jamin's two-day stay in the Second City last week included a trip to Villa Park to watch Villa progress to the FA Youth Cup final with a dramatic penalty shootout victory over Manchester United. He was the guest of Villa fanatic, historian and author Colin Abbott, a friend of our Claret & Blue podcast. The French journalist interviewed Birmingham Live for a feature to be broadcast in France in the build up to Wednesday's opening tie and returned the favour by discussing what Villa and Emery can expect at the Parc des Princes. "I do not know whether Emery will be applauded or will be booed," he admitted. "Supporters liked and respected Emery because he is a likeable and respectable man. His behaviour and character was good in his time in Paris, but 'Le Remonter', again that is what is remembered. He is thought of as a good coach, but not the best coach." There will be several intriguing sub-plots. French international Lucas Digne, an unused substitute on the Barcelona bench for that fateful night, left PSG just as Emery was arriving in 2016 and was regarded as a steady and reliable left-back during his time with Les Parisiens. In a quirk of European competitions, Marco Asensio is permitted to play against his parent club and while the free-scoring Spaniard is loved in Birmingham and respected in Paris, Enrique's men are not missing Marco. Not when they boast a frightening forward line fronted by Ousmane Dembele who has already rattled in 31 goals for club and country so far this season. 'How much do you know about Desire Doue?' asks Jamin. Probably about as much as you know about Morgan Rogers, we reply with a smile. Seemingly without a care in the world, Doue, the 19-year-old wonder winger, tucked away the deciding penalty against Liverpool at Anfield in the previous round, scored the winning goal to clinch the Ligue 1 title with victory over Angers last weekend and is increasingly being hyped up as France's answer to Barca's Spanish teen sensation Lamine Yamal. Not much is known about our Holte End darling Rogers in France, admits Jamin, although his Champions League hat-trick against Celtic and elevation to full England honours this season hasn't gone unnoticed by French football fans. Then there's Emi Martinez, the world's No.1 and France's public enemy No.1 for his World Cup final s**thousing heroics for Argentina in 2022 can expect a particularly hostile reception. But, let's face it, those are very much the sideshows to the main event of Luis Enrique's Paris Saint-Germain versus Unai Emery's Aston Villa. It will be on TNT Sports rather than Netflix, but the new two-episode season of Emery in Paris: The Comeback promises to make compelling viewing. Our Aston Villa podcast, Claret & Blue, is also available to watch and listen on all major streaming services. You can subscribe to the YouTube channel here , while you can access the podcast on Spotify here and via Apple here .