Alonso and Mascherano were both forced off with knocks yesterday while Torres missed the game altogether after feeling a pull in his hamstring in training. However, Rafael Benitez expects all three players to be fit to face West Ham on Saturday.
"Mascherano twisted his ankle and Xabi picked up a knock," said the boss.
"He [Alonso] has some bruising, but I think he will be okay in a few days.
"Fernando had a problem with his hamstring and it would have been a risk to play him today. In the end we decided to leave him out of the squad, which I think was the right decision.
"I think he will be back next week. He was very close today, but to start with him could have been dangerous.
"To keep him on the bench, maybe without a proper warm-up, could have also put him at risk, but I think he will be ready for next week."