Barca host Champions League opponents Stuttgart tonight with the aggregate locked at 1-1.
Alves is fully aware of just how important the FIFA World Player of the Year is to the team.
"He's in excellent form. He's saving us a lot," said the defender. "We've got the best player in the world.
"He pulls the team forward, takes charge and we are the keys that help operate the command.
"I hope that the attack keeps working right to the end."
Barca goalkeeper Victor Valdes, who also shone against Valencia as he kept another clean sheet, agrees with his team-mate and believes that Messi could become even better.
"He's the best in the world," said Valdes. "What he contributes with his talent makes him stand out.
"He could become the best player in history.
"I'm happy with the way things are working out. I'm in a good moment, both individually and for the team."