Xavi retains "blind confidence" in Ansu Fati and is baffled by talk of the Barcelona forward's future being uncertain.
Fati has made 20 appearances for Barca in LaLiga this season, but 13 of those have come from the bench with two of Raphinha, Ousmane Dembele and Gavi usually preferred out wide of star striker Robert Lewandowski.
Reports this week credited Premier League trio Manchester United, Liverpool and Arsenal with an interest in Fati, who has scored three league goals and provided three assists in his limited playing time this term.
Speaking ahead of Sunday's trip to Villarreal, Xavi said Spain international Fati can make a big impact now and in the future, questioning why rumours about his future were rife outside the transfer window.
"We expect a lot from him, I have blind confidence in him," Xavi said of the 20-year-old. "I have it with everyone. We have been shaping the squad based on what I wanted.
"I have confidence with everyone and especially with Ansu. He is a player for the present and for the future. He has to have patience and give everything when he comes in, which he is doing.
"At this moment there is no one transferable. The market has finished, I don't know what we are doing talking about sales, we are playing the season.
"We are talking about the sale of Ansu, who was not talked about all month in January. I don't understand it and even less in the Barcelona environment. I have a lot of hope for him."
Fati will hope to get a chance to impress at the Estadio de la Ceramica – he has scored four goals in five league appearances against Villarreal, more than against any other opponent.
Barcelona must juggle two competitions in the coming weeks, with the first leg of a mouthwatering Europa League tie against United coming four days after their meeting with Villarreal.
Xavi, however, is taking things game by game, saying: "There is no priority, we want to win the titles for which we compete. The most important game is always the next one."
Barca are likely to be without captain Sergio Busquets for at least two weeks after the 34-year-old suffered a sprained ankle in last week's 3-0 win over Sevilla.
The Blaugrana great is yet to pen a new contract amid suggestions Inter Miami hope to lure him to Major League Soccer, and Xavi reiterated the midfielder will decide his own future.
"With Busi there will be no problem," Xavi said. "He knows that he is extremely important. He is a living legend and his personal decision will mark his future. Only he decides.
"We go as the president [Joan Laporta], Busi and I and there is a very good vibe. It will depend on Busi, what he wants to do."