No team ever tanks. Players are far too competitive to tank.
That's not how it works. The coach/GM doesn't ask the players to play poorly, that's silly, they build a roster that sucks and make purposefully bad starting lineup and strategy decisions. It's out of the players' hands.
And players themselves would never tank, but not because they are too competitive, this is also silly, it's because they would depreciate their own value as a commodity and injure their careers.