Anelka's goal made the two managers pound their fists on the sidelines. The difference was that Nottingham Forest's manager slammed his fists in excitement and the Villarreal manager, Pellegrini, did so in frustration.
With fifteen minutes left in the game, Nottingham Forest led with two goals. This game was basically ready to announce its winner.
Villarreal had just adjusted its tactics and was ready to defend when the goal was scored. It was a heavy blow to their morale. Now, even if they wanted to climb back up with a goal, there was probably no chance of that.
Another person who was angry about conceding the goal was Riquelme. Although he seldom revealed his emotions on his face, anyone could see his frustration.
If the manager had insisted on attacking, perhaps they would have already equalized the score in the game before the Forest team chalked up the second goal. At that time, the situation on the field would have been different.