1 / 66The following criteria was used to determine the greatest player rivalries in NBA history: 1) What is the historical significance between the two players? 2) Did the two players meet often in the playoffs and if so, how competitive were they against one another? 3) Are the players attached in some way (same draft year, traded for each other, former teammates)? 4) Were the two players often the “marquee matchup” of the night when their teams played against each other? 5) Was there an incident or altercation that created bad blood between the two players? 6) Do media and fans tend to compare the two players and create debate as to who was the better of the two? Click through this gallery for a look at the 70 greatest player rivalries in NBA history.