Koss22---True! Basketball because of all the different variables involved in every single game is ripe for upsets. The men's game even more so than the women because of parity. Even the best player that ever lived can have a night when nothing drops for them. Other nights an average shooter can be "lights out". Put those two nights together and you have your upset. This is one reason why I like to also consider why a team either won or lost in evaluating how good they are. Compensating for variables so to speak.
Jazz- That is why I don't care for game plans that are too dependent on one player. The odds of that player having an off shooting night or being defensively targeted successfully factors in losses.