He has managed a number of top clubs in Serie A, the high point of his career being his stint as manager of A.C. Milan (1998–2001), with whom he won a scudetto, in his first season in charge (1998–99). Other notable clubs coached by Zaccheroni include Lazio, Inter and Juventus, all as interim coach for part of a season. He won the Asian Cup in 2011 as manager of Japan. Zaccheroni is also renowned for his unconventional and trademark 3–4–3 tactical system.