Vilanova touched down from New York on Tuesday.
"I am very happy that he has returned. We all need him. He will be making his return to the job gradually," Tello told reporters.
"The important thing is that he makes a full recovery so that he can be back with us as soon as he can.
"We have noticed Tito's absence because the coach is an important figure for any team. He has not been able to help us but Jordi and the rest of the players have always been there to help out."