Strategy of defender

What is tactics as defender?

Hi Erfan,

The first thing is to keep the ball consistently on the table.  This will add pressure to the attacking player.

Then keep the ball low in general so that the attacker can't hit the ball too hard.

Try to move the other player around and keep the ball in an awkward position for them to make the attack easily.

Some defenders will also try to attack when they get the opportunity.