You have to be careful, lest you’ll get called for 3 seconds in the lane, like Caron Butler has done a couple times this year, getting caught too long in the paint at the elbow.

So yea, in a sense it’s a soft-double, or 1.5 as Flip said. The big man knows a there’s potential for a double, but you’re not exactly leaving your man.

However, you can lose your assignment as the other team’s zone offense shifts … that’s how the Spurs were able to get some open threes when the help concentrated on Duncan too much.