Jose Mourinho doesn't seem like the type of manager who listens to anyone's advice except his own and, for the majority of his career, he didn't need it as he accrued titles across Europe.
However, with his reign at Manchester United hitting some significant speed bumps over recent weeks, everyone seems to have an opinion on how the Portuguese boss can turn things around at Old Trafford.
And, whilst Mourinho has likely blocked out much of the "advice" he might be well advised to listen to the latest warning. That's because it comes from Xavi, the Barcelona legend who has plenty of experience when it comes to winning.
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Xavi may have been Mourinho's rival during the latter's time as Real Madrid manager but, now that neither men are employed by their respective La Liga club, the veteran midfielder is free to offer helpful advice from afar.
And, in comments relayed by the Mirror on Monday night, the 36-year-old warned the United manager not to make the same mistake he made when things got tough in Spain.
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"Sometimes, when things don’t go well for Mourinho, he wants war not football - like when he was at Madrid - and I hope we don’t see that again in England."
Anyone who has listened to Mourinho in recent weeks as his United team struggled to just one win in six Premier League fixtures may be of the opinion that the Red Devils manager has already gone to "war".
He has grown increasingly sarcastic in press conferences and post match interviews and has consistently called out his critics as "Einsteins".
According to Xavi, however, this isn't the way for Mourinho to get the best out of his squad.
With league titles in Portugal, England Italy and Spain, there is no doubt that the 53-year-old manager knows how to win just like Xavi.
Nevertheless, things have certainly turned sour in recent times, dating back to the final few months of his time in charge of Chelsea.
Perhaps, then, a more positive outlook would be the best way to turn around United's fortunes and the media scrutiny than continues to grow.
Even if he does that, Xavi isn't predicting Mourinho will be able to help his new club to Premier League glory this season.
In the ex-Barca star's eyes, a cup triumph may be the best the United boss can hope for before more signings arrive.
"The domestic competitions have to be everything for United and Mourinho this season. I don’t think this season they can win the Premier League. These competitions are their hope for a trophy.
“Once Mourinho has had another transfer window, maybe they’ll be ready, but for now they must secure a finish in a Champions Leauge spot - that’s where United belong."