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."
|Muntari joins Seedorf at Deportivo La Coruna|
|F1 champs Mercedes launch new W09|
|Wigan coach Wane ponders Hardaker lifeline|
|Hamilton hopes for pre-season contract resolution|
|Winter Olympics 2018: Joy for Gisin, Hirscher´s woe and record-breaking win for Wu|
|Rooney: Moving to China for the money would have been easy|
|Carrasco left out of Atletico squad amid China move reports|
|Arthur: Move to Barcelona still on track|
|Blatter backs Morocco 2026 World Cup bid|
|Moeen backs Rashid, Hales white-ball decisions|
|Wenger sees Welbeck emerging from torrid struggles|
|Zidane stands by selfless Benzema|
|Sodhi earns New Zealand ODI recall|
|´Important names´ keen on Inter star Icardi|
|Hughes returns in only England change|
|Manchester United v Chelsea: Mourinho and Conte´s feud in their own words|
|Manchester United v Chelsea: Grant´s disastrous debut, Drogba´s ´offside´ goal and other Old Traffor|
|Walker motivated by EFL Cup final showdown with Arsenal|
|Manchester United v Chelsea: ´Specialist in failure´, eye-pokes and Mourinho´s other best rows|
|CONCACAF Champions League Review: America close in on quarters with huge win|
|Keane defends Pogba as former United captain demands more from Lukaku and Sanchez|
|Stoger labels Reus ´indispensable´ amid Milan links|
|Ferdinand and Man United team-mates doubted De Gea|
|Sock, Isner and Raonic crash out at Delray Beach|
|Rain sees Cilic-Monfils suspended at crucial stage|
|Djokovic steps up rehab as Federer leads the way|
|Cuban fined $600K for tanking comments|
|Fowler says PGA National demands full attention|
|Rory McIlroy curbing expectations before Masters|
|Shakhtar would´ve won by more if not for Roma´s Alisson – Fonseca|
|Popovich would be ´surprised´ if Leonard returns for Spurs this season|
|Championship Review: Wolves squander two-goal lead to Norwich, Cardiff City take advantage|
|Mourinho happy with ´big effort´ from Pogba|
|Benneteau ousts Bautista Agut in Marseille|
|Mourinho questions medical staff after ´bad´ Herrera injury|
|Sarri demands better from Napoli ´buffoons´|
|Mourinho hugs reporter for asking about McTominay instead of Pogba|
|Di Francesco slams Roma: I should have substituted half of them!|
|Curtains for Konta and Ostapenko in Dubai|
|De Gea happy with ´important´ wonder save|
|Woods eager to experience Masters ´rush´|
|Vazquez and Asensio important to Madrid, says Zidane|
|Shakhtar Donetsk 2 Roma 1: Fred stunner seals first-leg comeback|
|Sevilla 0 Manchester United 0: De Gea ensures Mourinho´s men stay level|
|Klaasen and Duminy half-centuries set up T20 decider|
|Herrera injury gives dropped Pogba chance for reprieve|
|Tindall urges England to ´hunt´ vulnerable Scotland|
|Firmino insists he did not abuse Holgate|
|Leganes 1 Real Madrid 3: Casemiro inspires comeback for Zidane´s men|
|Milan have everything to lose – Gattuso worried about complacency|
|United a big team in defeat - Mourinho aims dig at City|
|Firmino escapes punishment after Holgate allegation|
|Mourinho benches Pogba for Sevilla clash|
|Cavendish withdraws after Abu Dhabi crash|
|Rugby greats put on show in French Alps snow|
|Gremio refute claims of €40m Arthur agreement with Barcelona|
|Messi will sign another Barcelona contract, predicts Bartomeu|
|UEFA rejects PSG appeal over Rabiot´s Real Madrid booking|
|Hardaker sacked by Tigers after failed drugs test|
|James to miss ´a few days´ of Bayern training with calf injury|
|Bellew not feeling Haye love|
|Nantes not stopping Ranieri if Italy come calling|
|Milan owner Li slams ´fake news´ over financial woes|
|Italy make three changes for France encounter|
|Wenger still gunning for top four spot with Arsenal|
|AFC Champions League Review: Kanazaki braces inspires Kashima|
|Gloucester centre Scott to re-join Edinburgh|
|Ospina to get Wembley nod as Wenger waits on Ramsey|
|Pogba not struggling at United, claims Deschamps|
|No police action against Gloucester coach Ackermann or son after nightclub incident|