Juventus have no intention of selling Arturo Vidal this summer unless the Chilean midfielder expresses his wish to leave.
The 27-year-old Vidal, who has three years left in his contract with the Italian champions, is a reported target of Manchester United this summer.
New United boss Louis van Gaal is looking to strengthen his squad after a dismal season that saw the Red Devils miss out on European football for the first time in 25 years.
"Vidal is a Juventus player and we have never put him up for sale," Juventus club administrator Giuseppe Marotta said in a press conference on Wednesday. "A lot of clubs have asked for him but we have never sat down to negotiate.
"We want to keep him."
Vidal, who scored 11 goals in 32 league appearances to help Juve win their third straight league title in the 2013-14 campaign, is currently on holiday in Chile after helping his country reach the last 16 of the World Cup, where they lost on penalties to tournament hosts Brazil.
The former Bayer Leverkusen star recently admitted he would be happy to remain at Juve.
"From experience, I know that a player is the one that decides his future," Marotta said. "Vidal has expressed many times how happy he is to remain in Turin and if that is confirmed, we will be happy to continue together.
Vidal is expected to arrive in Turin for pre-season training on July 28.