In Turan's case, most expected better. Before the recent friendlies against England and Montenegro, Terim had launched a passionate defence of his star player, claiming the Spanish press had singled out Arda for unfair criticism.
After the game against Croatia, however, even the 29-year-old held his hands up and admitted that he was off the pace, saying sorry to the supporters: "First of all I have to apologise to the fans for my poor performance. I think I played badly."
Arda arrived at Barca as a replacement for Xavi and needless to say he has been unable to fill those sizeable shoes. Not even close. Despite sitting out the first six months due to the transfer ban in the second half of 2015, he showed some nice touches in his first few games. Later, however, he has failed to build on that early promise.
The perception is that he needs far too many touches to be a successful member of the Barca midfield. Other players, like Javier Mascherano and even Neymar, have taken time to adjust at Camp Nou, but Arda was expected to adapt faster - especially as he was already a success in La Liga.
But it hasn't happened and by the end of the season, he had slipped down the pecking order so far that players like Sergi Roberto and Rafinha were seen as more reliable options from the bench. And at €34 million, he is being talked about by some as one of the worst signings in the history of the Catalan club.
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