Philippe Coutinho hopes Xavi can achieve success with the existing group of players at Barcelona.
Xavi was presented as Barca's new head coach on Monday, returning to the club that formed him as a player and with whom we won 25 trophies during an illustrious 17 years.
The former midfielder is the permanent successor to Ronald Koeman, who was sacked following the 1-0 defeat at Rayo Vallecano on October 27.
Sergi Barjuan stepped in for the interim and took charge of a win and two draws, the last of which saw Barca throw away a three-goal lead to draw 3-3 with Celta Vigo. They now sit ninth in LaLiga after 12 games, 11 points adrift of leaders Real Sociedad.
However, Coutinho believes Xavi could well be the man to turn things around at Barca following the exits of Lionel Messi and Antoine Griezmann.
"Xavi was a great player, an idol, and now he's back home at Barcelona," he told a news conference while on international duty with Brazil. "I hope he can be very successful with the group we have.
"I was able to talk to him once when I had to visit some doctors in Qatar. I know what a great guy he is. He will definitely do a great job at Barcelona."
Coutinho, who returned from nine months out with a knee injury in September, was accused by Catalan newspaper Sport of being lazy when warming-up on the sidelines against Celta.
He denied that was the case and insisted he is keener than ever to put in work as he prepares to make his first Brazil appearance in over a year.
"I was kind of surprised when I got home and saw the story. I've never lacked professionalism in my life. I've always respected everyone I work with. But it's okay. I respect the opinion of you journalists," he said.
"On my selection [by Brazil], I'm very happy and really want to be here. I'm focused on working, to achieve things through working, in the 10 days I have here."
He added: "I feel very good. It's obvious that being injured for nine months is not easy, returning from three surgeries in a row on the same knee.
"But since I came back I haven't had any pain or discomfort. I feel good."