Arsenal head coach Unai Emery applauded Sokratis Papastathopoulos for his impressive adaptation to English football and is depending on him in Thursday's Europa League quarter-final second leg against Napoli.
Sokratis joined from Borussia Dortmund at the start of the season after a solid five-year spell at Signal Iduna Park.
Despite his undoubted experience and physical presence, some had reservations about his suitability to the Premier League, particularly due to a perceived lack of pace.
But he has generally impressed in his 22 Premier League appearances, while he has also featured eight times in Europe.
The 30-year-old Greece centre-back is likely to start away to Napoli and Emery expects another top performance from him to help Arsenal reach the Europa League semi-finals.
"I think the adaptation [at] first is important and not easy," Emery told reporters in his pre-match news conference.
"It's different for different players. We spoke about that with Papa [Sokratis] in pre-season. His adaptation was with the time and the training, the matches are different in England.
"He took the big performances to help us, like he is now. We are very happy with him and [Thursday] is a big match, so we need players with experience. He's one of those players."
Arsenal head into the second leg with a 2-0 lead from the home leg, though Emery still considers the tie to be wide open given Napoli's talented squad.
When asked about Arsenal's chances of progression, Emery said: "It's 50:50, it's not changed for me.
"We played the first leg at home and we won, but if you did one question about the first leg when at home, we won. That's a normal result.
"But when you play here against Napoli and think they can beat you, it's a possibility because they are very strong at home. We are 50:50. It's not changed, but our mentality and target is to play to win.
"They are a great club with a great president and a great coach here. [Carlo] Ancelotti is a three-time Champions League winner.
"They have great players, their history is great history and their present gives them great opportunities and optimism to win things.
"They're second in [Serie A] and they will play against us in this round of the Europa League."
|Hamilton excused from media duties after Lauda´s death|
|Arsenal did not offer Ramsey new deal due to ´salary balance´ concerns|
|Hales hopes England door not closed, targets T20 World Cup|
|Ter Stegen out of Copa del Rey final|
|Ewan victory sees Demare nudge into Giro points lead|
|Khawaja sent for scans after blow to head|
|Diego Costa a doubt for start of Atletico´s pre-season with ligament sprain|
|Caballero commits to Chelsea for 2019-20|
|F1 Raceweek: Ricciardo or Red Bull to halt Mercedes? - Monaco GP in numbers|
|Deco: Valverde will be feeling heat at Barcelona after Liverpool loss|
|Caparros to be replaced as Sevilla coach but remain at the club|
|England have no margin for error at World Cup, warns Stokes|
|An iconic character - Villeneuve & Prince Albert remember Niki Lauda|
|Borussia Dortmund sign Leverkusen star Brandt|
|Rudi Garcia to leave Marseille|
|If my job depends on one game, I want to leave Chelsea immediately – Sarri|
|Sarri hopes Hazard stays at Chelsea but will respect any decision|
|NRL Opta facts: Retiring Cronk seeks 100th try|
|Trail Blazers give coach Terry Stotts multi-year extension|
|Guingamp and coach Gourvennec part ways following relegation|
|Coutinho returns to Barcelona training ahead of Copa del Rey final|
|Lam signs new long-term contract with Bristol|
|Aduriz agrees one-year Athletic extension|
|Those Star Wars writers might have been busy! Rodgers unhappy with Game of Thrones finale|
|He should have a statue in Perez´s garden – Real Madrid great lauds Zidane´s return|
|Gyan makes Ghana retirement U-turn after presidential request|
|49ers pass rusher Bosa tweaks hamstring|
|Kroos, Ter Stegen to miss Germany qualifiers|
|Archer brings X-factor to England attack – Root|
|Thorgan Hazard completes Borussia Dortmund move|
|Giannis not feeling pressure despite Raptors revival|
|Gundogan confident Man City will keep Sane despite Bayern links|
|Sterling wants to discuss tackling racism with FA and Premier League|
|Raptors´ VanVleet ends shooting slump after birth of second child|
|Pogba and Hazard to Real Madrid? It´s possible, says Varane|
|Plunkett hails ´special talent´ Archer|
|Solskjaer deserves patience at Manchester United - Van Persie|
|Yankees stay hot, pull away for win over Orioles|
|Three takeaways from Raptors´ Game 4 win over Bucks|
|Well-rounded Raptors level series against Bucks|
|Blues snap 49-year Stanley Cup Finals drought|
|Koscielny slams UEFA after Mkhitaryan withdrawal|
|Del Bosque defends Spanish clubs despite European failure|
|Pulisic keen to match Hazard impact at Chelsea|
|Durant ´100 per cent undecided´ about future, says manager|
|Rodgers says Packers´ new offense is ´going to look different´|
|Beilein explains decision to leave Michigan for Cavaliers|
|Warriors became ´unbeatable´ with Durant, says Green|
|Simeone reaffirms Atletico commitment ahead of rebuild|
|Wallabies star Sio re-signs until 2022|
|Lacazette adamant he´s in the form of his life|
|Cech denies he already agreed to Chelsea sporting director role|
|Fury expects Wilder rematch in March or April 2020|
|Costa avoids bone damage after suffering ankle injury|
|Canada beat USA, who must now face rampant Russia|
|Barty withdraws before rain scuppers play in Strasbourg|
|AFC Champions League Review: Oscar hat-trick helps Shanghai SIPG progress|
|Zverev cruises through in Geneva as Dimitrov crashes out|
|Luka Doncic & Trae Young top 2018-19 NBA All-Rookie first team|
|F1 Raceweek: Can Verstappen stop Hamilton & Bottas in Monaco?|
|Sri Lanka end ODI winless streak in Edinburgh|
|Ratchford set for long injury absence|
|It´s staying up! - Bernardo Silva shows off good-luck Christmas tree|
|Varane vows to stay at Real Madrid for next season|
|Shahzad and Naib star as Afghanistan bounce back in Belfast|
|Argentina has strongest possible squad - Scaloni|
|Kohli expecting his ´most challenging World Cup´ yet|
|Kompany set for Manchester City testimonial at Etihad Stadium|
|Love you man – Lewis Hamilton pays tribute to Niki Lauda|
|Garitano replaces Abelardo as Alaves coach|