1989 NBA playoffs - Wikipedia
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The Pistons had one of the most dominant playoff runs in NBA history, finishing 15–2 with their only losses to the Chicago Bulls in the Eastern Conference Finals.
Bulls–Pistons rivalry - Wikipedia
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The Pistons dominated the early parts of the series, stifling the Bulls' guards to sub-40% shooting to win not only the first two games at home, but also the first game in Chicago, in which the Pistons came back from a 17-point deficit in the second half.