http://outsideoftheboot.com/2015/07/05/tactical-philosophy-frank-de-boer/
good link ^ with pictures and stuff.
De Boer is true to Ajax’s 4-3-3 with a balance of the tactical ideals of Cruyff and van Gaal. He incorporates van Gaal’s sense of detail in defensive organization and pressing, and Cruyff’s favoured ball circulation and positional interchange in build-up play. He also tends to rely on the intelligence of players to do what the game demands of them and as such his tactics form a framework more than a static system of play.
Off the ball, de Boer’s Ajax tend to defend deep, setting up a compact midfield block with five midfielders behind the ball (4-5-1).
A 2-1 win against Barcelona was vital to send Ajax to the Europa League after being knocked out of the Champions League in the 2013/14 season. On the night, they pressed and harried the Barcelona players off the ball, despite playing most of the second half with ten men. Goals from Thulani Serero and Danny Hoesen gave them a result that would have surely made Johan Cruyff smile.
A year before, de Boer’s Ajax played a key role in knocking Manchester City out of the Champions League and taking a Europa League spot for themselves. Beating a Manchester City team laden with riches with a young team of academy products was no mean feat by the Dutch side.
THREE KEY PLAYERS DEVELOPED
Frank de Boer led Ajax’s youth academy in 2007, with Christian Eriksen (Tottenham Hotspur), Toby Alderweireld (Southampton on loan from Atletico Madrid), and Daley Blind (Manchester United) being some of the major beneficiaries of his tutelage then in the academy, and soon after in the first team when he took over the managerial role in 2010.
During his stint in the youth academy, de Boer
spoke highly of Eriksen, “He’s always on the move. Quick thinking. He has eyes in his back. When you think he doesn’t see you, he sees you.” He
believes that Daley Blind is best suited as a central midfielder for Manchester United although he began plying his trade as a full back. Belgian defender Toby Alderweireld formed a partnership with Jan Vertonghen that provided a basis for Ajax’s 2010-11 and 2011-12 title successes, but were replaced ably as de Boer’s Ajax extended their run to four consecutive Eredivisie titles.