Barcelona coach Ernesto Valverde will put personal feelings to one side on Wednesday as he plots the downfall of former employees Olympiacos in the Champions League.
Valverde enjoyed two successful spells in charge of the Greek club, sandwiched in between a brief stint with Villarreal, winning the Greek title three times and also adding the cup in two of his three seasons at the helm.
Now with Barcelona, the group draw has provided the experienced Spaniard with the chance to go head-to-head against a club that is still close to his heart.
"It's an emotional game for me, as it will be when we play there. It's a magical stadium where they play, and I had a lot of fun there," Valverde told the media.
"They've changed team a lot since then, but their style hasn't changed. They are accustomed to winning, and that's what I like.
"They have won titles and I still know a lot of people there. They showed me a lot of love – and the feeling is mutual. I said when I left that a part of me was staying there.
"Unfortunately, we are playing against each other now, but I hope they enjoy the two games. It will be emotional for me."
However, there will be no sentiment shown at Camp Nou, with the hosts eager to make it three wins from three in Group D ahead of the return fixture in Greece on October 31.
In contrast, Olympiacos are yet to pick up a point after defeats against Sporting Lisbon and Juventus, although Valverde is taking nothing for granted.
"They need to win. They have a lot of hopes for this competition but have lost their first two games," he said.
"They might be able to surprise us on the counter-attack. They have fast, quick players and this is what they live for – to enjoy these type of moments. I think it's going to be a difficult match."
Barcelona go into the game off the back of a 1-1 draw with Atletico Madrid and while Valverde admits his players were fatigued after their exertions at the Wanda Metropolitano, he will still pick the strongest available XI on Wednesday.
"It's an important match, but we also have to face Malaga after that, so I will put out the best players I can for this game," he added.
"It's true – the other day, the players said after the game [against Atletico] that they were a little tired. They'd come off a couple of tough weeks. But they've now had four days without a game.
"We are thinking about the three points that give us a good cushion. But we are also trying to pay attention to the importance of the game. We know they haven't won. We are clear that tomorrow's match is very important."
|Koepka in control in South Korea, on track to become world number one|
|Dovizioso grabs pole at Motegi, Marquez sixth|
|Langer backs Marsh for ODI squad|
|Butler turns boos to MVP chants in Timberwolves´ first win|
|Brewers force game seven against Dodgers in NLCS|
|Guardiola admits Hart decision may have been a mistake|
|Vieira: Balotelli the same now as he was at 16|
|Butragueno backs under-fire Lopetegui|
|Liverpool´s defensive improvement has hurt attack – Klopp|
|Butler booed by Timberwolves fans during introductions|
|Pochettino: Dier´s Ramos tackle highlighted Spurs´ attitude|
|Man City working on new deal for Sane – Guardiola|
|Golden Knights sign RW Tuch to seven-year extension|
|Bryant explains how Lakers could beat Warriors|
|Finals hopefuls Isner, Fognini into Stockholm semis|
|Browns trade running back Hyde to Jaguars|
|Mourinho: I´d love to have Hazard at Manchester United|
|Hamilton´s title chances enhanced by Vettel´s grid penalty|
|Deja vu for Enisei as La Rochelle inflict another thrashing|
|Five-star Jovic makes Bundesliga history|
|Liverpool´s scoring slump no concern for cautious Klopp|
|He´s the Special One - Sarri insists he is not on Mourinho´s level yet|
|Second-half blitz guides Leicester to European success|
|Sheffield Wednesday 1 Middlesbrough 2: Besic, Assombalonga see off Owls|
|Goerges rallies to reach Luxembourg Open final, Jabeur makes history|
|Howe: Transfer speculation will not disrupt Ake|
|´Do we really want opera every night?´ - Klopp not changing Nations League view|
|Vile and abhorrent – Chelsea´s Carney responds to online abuse|
|Giants WR Beckham Jr. explains why he might cramp up: ´I really don´t like water´|
|Man City pay training-pitch tribute to Joe Hart|
|Neymar to be rested as Tuchel rubbishes Ballon d´Or concerns|
|Sarri ´not interested´ in Christensen father´s quit threat|
|Cardinals fire offensive coordinator McCoy after 1-6 start|
|Neymar return unlikely, but anything can happen – Valverde|
|Bairstow a doubt for fourth ODI|
|Manchester United fined for late arrival and delayed kick-off against Valencia|
|Australia-Pakistan chat not ´especially polite´ - Sarfraz|
|Pogba relishing ´pressure game´ against in-form Hazard|
|Don´t bet on Cardiff survival, warns Warnock|
|Buffon enjoying Tuchel´s methods at PSG|
|RIP to Wimbledon epics! Isner feels like The Undertaker following final-set tie-break rule|
|Sevilla performance sealed Bernat´s Bayern exit - Hoeness|
|Keita set to miss out as Liverpool monitor injured stars|
|He didn´t want to be here – Guardiola doubts Sancho will return to Manchester City|
|Sarri: Manchester United are the best in the Premier League|
|Mourinho salutes ´brave´ Shaw for ´best possible´ response to criticism|
|No Ballon d´Or distractions for Griezmann, insists Simeone|
|Wigan stand by Hardaker as full-back prepares to undergo rehabilitation|
|Barcelona deny Neymar talk|
|Hazard can win the Ballon d´Or as a Chelsea player, insists Sarri|
|De Bruyne in contention to start in Manchester City´s clash with Burnley|
|Neymar needs to mature to reach Messi levels - Xavi|
|We have a hell of a lot to do - Paine slams Australia batting|
|Kerber and Osaka to meet at WTA Finals|
|Lorenzo out of Japanese MotoGP|
|Real Madrid handed Africa trip in Copa del Rey|
|Allegri: Ronaldo has sharpened Juventus focus|
|No Wade in Wasps squad amid NFL reports|
|Rooney: Five of us controlled Man United dressing room|
|Bayern bosses launch scathing attack on ´disrespectful´ media|
|Saints lock in Lawes to new deal|
|Adelaide United 1 Sydney 1: Debutant Le Fondre rescues a point|
|Madrid can´t look back, only forward - Lopetegui confident of revival|
|Wimbledon to introduce final-set tie-breaks|
|Abbas inspires Pakistan to series victory|
|Madrid boss Lopetegui hopeful on Bale availability|
|Mood is positive at Bayern, insists under-pressure Kovac|
|LeBron offers food for thought after losing Lakers debut|
|Bolt future not an immediate concern for Mariners|
|Hazard: I could finish my career at Chelsea|