Defending
From Hattrick
The ability to stop opponent's attacks. Unconditionally the most important ability for all types of defenders. Midfielders may also put this ability to good use.
It is also relevant on all players when using the Pressing tactic.
Training defending is traditionally the best way to make money through training. The ability to train ten different players at once means you will ultimately make a larger profit than those training types that work on smaller numbers of players