He spent a season in charge of Barcelona B, a reserve side for the main club, before his four trophy-laden years with Barcelona.

WSJ: Guardiola to Manage Bayern Munich

Roma had hoped to import the philosophy when it hired Luis Enrique who, like Guardiola, had played for Barcelona and only ever managed Barcelona B.

WSJ: Pep Guardiola: The World's Most Coveted Coach

Joining them are a number of trialists including former Barcelona B striker Gordon Maric, ex-Tottenham youngsters Troy Powell, Nick Chrysanthou and Takura Mtandari and 20-year-old forward Chris Craig, who is out of contract at Rangers.

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After Mali opened their Group B campaign with a 1-0 over group outsiders Niger, former Barcelona star Keita wore a T-shirt with the words "Peace for Mali" as he gathered his man of the match award.

CNN: Mali bring cheer with Africa Cup of Nations progress