Is football still round after deflation?

Football is actually not solid, it is hollow, so it needs to be inflated. Generally speaking, we use traditional football, which is basically made up of four pieces of leather tires.

There is an air bag inside the tire, which is also connected to an open channel dedicated to inflation, which is fastened by an inflation tube. This is for the convenience of inflating the football. Now, many rugby balls have another feature that they can directly pass through a synthetic material through an inflation valve, and the football can be inflated at the center of this synthetic material.