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 says winning two U.S. Opens not even in his ´wildest dreams´|
|Hernandez: Griezmann an idol at Atletico|
|Sri Lanka take charge despite Gabriel exploits|
|U.S. Open final-round timeline: How clinical Koepka kept his crown|
|Koepka fights off challengers to successfully defend U.S. Open title|
|´Aching´ Neymar urges referees to intervene|
|BREAKING NEWS: Koepka holds on to defend U.S. Open title|
|Lozano goal causes artificial earthquake in Mexico|
|Djokovic: Mental battle will be Murray´s biggest|
|Hummels criticises Germany tactics in Mexico loss|
|Brazil the latest favourites to stumble, but Tite and Neymar won´t panic|
|Magnificent Fleetwood matches U.S. Open record with closing 63|
|Brazil 1 Switzerland 1: Zuber pegs back below-par Selecao|
|Warrington hold off Wakefield fightback, Tigers held despite Hitchcox heroics|
|Germany follow trend of poor starts for World Cup champions|
|Reed on the charge as U.S. Open race hots up|
|Milinkovic-Savic can play for any team in Europe, says Crespo|
|Southgate keen to unleash his bold new England|
|Konta fumes as Barty takes Nottingham title|
|Kante hails Pogba´s match-winning contribution|
|Germany struggle with generation gap|
|Neymar to make first competitive start since February in Brazil´s World Cup opener|
|Kane gunning for Ronaldo hat-trick heroics in England opener|
|Balotelli would fit in at Marseille - Raiola|
|Captain Ki happy to get tough on South Korea|
|Senegal call up Mbengue with Ciss ruled out|
|Mickelson celebrates at scene of Saturday meltdown|
|Germany 0 Mexico 1: Lozano stuns woeful reigning champions|
|Chandimal to face hearing after pleading not guilty to ball tampering|
|Griezmann ´must do more´, says Deschamps|
|Gasquet shows his class on grass to end Chardy´s chances|
|Courtois: Belgium outsiders not World Cup favourites|
|You can´t compare Ronaldo and Messi – Adrien Silva|
|Kiwis name seven uncapped players for England Test|
|Lorenzo tells critics: Remember MotoGP wins next time I struggle|
|Maaloul singles out ´future of English football´ Alli as main threat|
|Poland v Senegal: Nawalka waits on Glik|
|All Blacks draft in Riccitelli and Hemopo, Barrett not risked for third Test|
|Palermo to appeal play-off result after ´illegal game´|
|Once a year is not enough! - Alonso loved Le Mans bow|
|Colombia v Japan: Kawashima eager to right the wrongs of 2014|
|Russia v Egypt: Salah poised to derail hosts´ juggernaut|
|South Korea swapping kit numbers to confuse Sweden|
|Neuer, Ozil start for Germany in World Cup opener|
|Costa Rica and Serbia serve up plenty of the spectacular in sunny Samara|
|Alonso edges closer to ´Triple Crown´ with Le Mans glory|
|Costa Rica 0 Serbia 1: Kolarov stunner seals points|
|Belgium are better than Argentina – Gomez and Panama ignoring Iceland result|
|Messi, Ronaldo or Neymar would keep the goal - Evra defends Pogba|
|Two in a row for dominant Lorenzo in Barcelona|
|Maradona denies racism claim|
|Resilient Krunic breaks Tour duck|
|Federer wins Stuttgart Open on his return|
|Injured Vunipola to miss England´s series finale in South Africa|
|Ibrahimovic not involved in Sweden´s World Cup plans, insists Andersson|
|Sri Lanka captain Chandimal charged with ball tampering|
|Portugal will not underestimate Morocco, vows Adrien Silva|
|Messi is not Maradona, he does not win a World Cup alone - Crespo|
|Hourcade resigns after Pumas´ series defeat|
|Second place is worthless - Rivaldo admits pressure is on Neymar and Brazil|
|South Africa character made up for mistakes - Erasmus|
|No World Cup pressure for Serbia, insists Matic|
|England need to learn lessons now - Farrell|
|Russia´s Dzagoev to sit out Egypt clash|
|Bellamy celebrates new Storm deal with a win|
|Kane: England captaincy will not change my game|
|High-scoring U.S. Open ´a different kind of fun´, says Rose|
|Nigeria must return to the drawing board after Croatia defeat - Mikel|
|England head into Tunisia clash at full strength|
|Murray´s expectations ´very low´ on return|