 Bergkamp was schooled in Total Football , a playing style and philosophy which relied on versatility . This was primarily to maximise the footballer 's potential ; players tried out every outfield position before finding one that suited them best . Every age group at Ajax played in the same style and formation as the first team – 3 – 4 – 3 – to allow individuals to slot in without effort when moving up the pyramid . Bergkamp " played in every position apart from goalie " and believed he benefited from the experience of playing as a defender , as it helped him " know how they think and how to beat them " . When he made his debut as a substitute against Roda JC , Bergkamp was positioned on the right wing , where he remained for three years . 
