Manchester United boss Ole Gunnar Solskjaer says Paul Pogba has "never been a problem" and there is an "agenda" against the France midfielder.
Pogba's agent Mino Raiola has said the 26-year-old wants to leave United and hopes "there will soon be a satisfying solution for all parties".
Pogba, who is on the club's pre-season tour, said in June that "now could be a good time to move elsewhere".
Solskjaer says the club have not received a bid for any player.
In his first pre-season news conference in Perth, Australia, Solskjaer made reference to a video of £89m record-signing Pogba and team-mate Jesse Lingard that was reported as a bust-up between the pair.
"It's an agenda against Paul, he's a great, great professional, never been any problems, he has a heart of gold," said the Norwegian.
"Jesse and Paul yesterday walking around was portrayed as a fight between the two boys and I know you're here to sell players and stories but they're all professional.
"Paul's never put himself out of the team, always given his best and I can't report anything other than that agents talk all the time.
"I can't be sitting here talking about Paul and what agents are saying, we've got a few years left of his contract and he's been fantastic."
Marcus Rashford also spoke at the news conference and addressed criticism of team-mate Lingard over a video the England midfielder posted on Instagram last month.
Lingard streamed a live video from a hotel while on holiday with Rashford in Miami.
Rashford, who signed a new a £200,000-a-week contract last week, said: "People need to understand he was enjoying his holiday, and it was a mistake."