The 46-year-old Dutchman, who will be formally unveiled by the Serie A club at a press conference on Tuesday afternoon, was approached to become the next Internazionale manager after Mancini left by mutual consent because of a breakdown in his relationship with the board.
“I hope I can achieve a lot of success here. I’ll see you tomorrow at the press conference!” De Boer told reporters on Monday.
De Boer had been linked with Premier League clubs Everton and Southampton before those vacancies were filled by Ronald Koeman and Claude Puel respectively. De Boer resigned as Ajax head coach in May but won four consecutive Eredivisie titles with the club between 2011 and 2014.
Mancini, meanwhile, left Internazionale after his relationship with the Chinese company Suning Holdings broke down over the summer.
De Boer’s first assignment will be a friendly against Borussia Mönchengladbach in Ancona on Wednesday night, with a match against Celtic in Limerick to follow before the Serie A season starts at Chievo on 21 August.
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