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Frank de Boer has left Ajax after agreeing an early release from his contract with the Eredivisie side.
De Boer took charge at the Amsterdam ArenA in December 2010, taking over from Martin Jol, and guided Ajax to four consecutive Eredivisie titles.
Having lost out to PSV last season, they looked set to regain the title this year as they sat top of the table heading into the final week of the campaign. However, a 1-1 draw at De Graafschap handed the league title to PSV for the second consecutive season.
De Boer's contract had been due to expire in July 2017 but he has agreed to an early termination.
"After winning four league titles in succession, the 2014-15 season was a disappointment. We wanted to rectify that in the last season and we did everything, but it did not become what we had all hoped for and expected," said De Boer.
"I started to realise more that it was time for something else. It's better for me and I think also for Ajax. What I will do, I do not know yet. A year without a club is also an option and I will see what comes my way.
"I cherish above all the beautiful memories, with winning the 30th league title as the absolute highlight. Wherever I am, I will continue to follow closely. Ajax is my club and always will be."
De Boer has recently been linked with a move to the Premier League with his agent claiming the 45-year-old would 'love to join a club like Everton' and news of his Ajax departure comes in the wake of Everton's 3-0 loss to Sunderland.