It's an open secret that Antoine Griezmann has struggled to settle at Barcelona.
Only this week, team-mate Arturo Vidal admitted, "It has been difficult for him to integrate and adapt.
"He has arrived at the best team in the world, with the best players.
"He has come from a side that plays a very different way to Barcelona."
There weren't just tactical issues related to his time at Atletico Madrid, though.
There were also concerns over his personality.
Griezmann admitted himself that he hadn't spoken much with club captain Lionel Messi since arriving at Camp Nou during the summer for a €120 million fee because both are quiet characters.
Worryingly, Messi revealed that he and fellow forward and good friend Luis Suarez still shared a WhatsApp group with Neymar and that the South American trio "still talk a lot".
As always, though, how Griezmann fit in on the field was always going to be decisive.
And he wasn't helped by the fact that both Messi and Suarez had their respective injury issues at the start of the season.
Griezmann got some goals early on but there was still a question mark over whether he was really compatible with Messi and Suarez.
Getty Images
In Saturday's 3-0 win over Eibar, however, he went some way towards removing that question mark.
This was Griezmann's most impressive performance to date, for a variety of reasons, not least because it came away from home.
He'd struggled on the road in his previous outings for Barca. In fact, he hadn't scored an away goal for either the Catalans or Atleti since February 19.
He ended that drought just 13 minutes in, beating Marko Dmitrovic in the Eibar goal with the aid of the post after taking advantage of a smart long ball from Clement Lenglet – and an untimely slip from Pablo De Blasis.
Griezmann turned provider just before the hour mark, taking a pass from Suarez before teeing up Messi for the Argentine's 16th goal in his last 10 appearances against Eibar.
Just eight minutes later, Barcelona's front three combined again.
This time, Griezmann split the defence with a sublime through-ball before Messi rolled the ball into the path of Suarez to score into an empty net.
The quality of the opposition has to be taken into account, of course: Eibar are a bottom-half team with just two previous wins to their name this campaign.
However, this was an impressive performance from a team that has struggled on the road this season.
What's more, Griezmann's performance and the way in which he interacted with Messi and Suarez will come as a huge boost to Barcelona after what has been a difficult week in Catalunya.
Barca's front three don't have to be great friends; they just have to form a great forward line.
They looked like one at Eibar on Saturday afternoon.