It's safe to say Gary Neville isn't considered an expert when it comes to Spanish football.
The former Manchester United right-back turned TV pundit endured a horror spell managing Valencia, the defining moment, of course, being a 7-0 defeat to Barcelona.
However, when it comes to the Premier League, he knows his stuff, and he's come up with an explanation for the question on everybody's lips - what on earth was Claudio Bravo doing in the Manchester derby?
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The City goalkeeper will be grateful that his side still managed to win the game, albeit no thanks to his dreadful debut. The 33-year-old had a direct hand in Zlatan Ibrahimovic's goal, and that wasn't his only dodgy moment.
As for Neville, he will no doubt still be scarred by his experiences in La Liga, but he does remember one key difference that Bravo will have to learn to cope with in England.
"It isn't Spain. Having been in Spain myself, there isn't as much pressure put on the goalkeeper both on the ball with your feet and in the air," he told Sky Sports.
"There's no doubt in the next few weeks he'll have some questions to answer because other clubs - when he goes away from home in particular - will start to put that ball directly on top of him and see what he's like.
"You saw the Man United fans in the second half every time he had the ball and that will probably become normal practice."
If Saturday's game is anything to go by, the former Barcelona stopper has a lot of learning to do, and quick. In fact, United fans might argue he was lucky to stay on the pitch and not concede a penalty as well after his studs-up challenge on Wayne Rooney.
Pep Guardiola chose him to replace Joe Hart because the latter isn't particularly strong with the ball at his feet.
The new City boss wants his side to play out from the back, so it makes sense to have someone like Bravo between the sticks, but he must be praying he doesn't make any more howlers.
Was Guardiola right to replace Hart with Bravo? Have your say in the comments.