Petrus Johannes "Piet" Keizer (14 June 1943 – 10 February 2017) was a Dutch professional footballer who played as a left winger. As part of the "Total Football" Ajax Amsterdam team of the 1960s and 1970s, Keizer was particularly notable during the successive managerial tenures of Rinus Michels and Stefan Kovacs (1965–1973). He is widely considered one of the greatest players in Dutch football history. Dutch writer Nico Scheepmaker once said: "Cruyff is the best, but Keizer is the better one". UEFA website has described Keizer as "the genius on the left wing, the skillfull flanker, the superb foil to Johan Cruyff". He was in the shadow of Johan Cruijff, with whom he formed the so-called royal couple. Keizer made frequent use of the scissor movement. Cruyff, in his posthumously released autobiography, placed Keizer, as left winger, in his "ideal squad".