Hard to believe Mesut Ozil was once at threat of being labelled an expensive flop at Arsenal.
In the months that followed his £42.5 million move from Real Madrid in 2013, concerns emerged that the German couldn't handle the rigours of English football.
That's despite consecutive FA Cup triumphs in his first two seasons in north London.
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And yet, three years on from his big-money arrival and Ozil has proved money well spent, developing into a fantastic attacking midfielder.
From a weedy and skilful No.10 at Madrid, Ozil has added strength and finishing to his game to become a more complete player.
Arsenal fans adore the 28-year-old, but according to countryman Dietmar Hamann, he needs two things to become a legend at the Emirates Stadium.
And while one is realistic, the other is a long shot to say the least.
In response to a question about whether Ozil is enjoying his best football, the German told Omnisport: "I would agree with that but he's got to do it for a full season.
"He's always showed in his two years in England that he's capable of doing that but he's got to do it over a longer period now.
"I think, to really go down in Arsenal folklore, he's got to win either the league or the Champions League.
"Winning an FA Cup is great, two is even better, but it's not the league or the Champions League. That's the task they have. I think they're capable of doing that."
Arsenal are on course to challenge in both competitions this season. Not only are they joint top in the Premier League, but they're also top of Group A in the Champions League, above French heavyweights Paris Saint-Germain.
Hamann believes the Gunners are on the brink of something special, though, and hailed Alexis Sanchez, Shkodran Mustafi and Granit Xhaka for their contributions.
"Playing Sanchez up top makes a difference as it makes them more flexible," he added. "They're not as static as when [Olivier] Giroud is playing. I think it helps everybody.
"In Mustafi and Xhaka, they've got two defensive-minded players that they've probably lacked in recent years, which makes them stronger defensively. That's probably where they lost titles in the past."