The Catalans are facing a period of transition following Ernesto Valverde’s arrival at the club.
The 53-year-old former Athletic Bilbao boss has taken the reins from Luis Enrique.
But according to Spanish news outlet Don Balon, Neymar is concerned by Barca’s lack of action in the transfer market.
Both right-back and central midfield are problem areas for the La Liga giants.
Barca are yet to fill the void left by Dani Alves in defence and Arsenal ace Hector Bellerin is viewed as his long-term heir.
Meanwhile Andres Iniesta suffered an inconsistent season and Barca need a credible replacement for the Nou Camp legend.
Paris St-Germain midfielder Verratti could be drafted in as the veteran playmaker is edged out.
However, moves the talented duo are yet to materialise and Neymar is getting frustrated.
Don Balon reckon the Brazilian forward has been informed by United and Paris St-Germain that they’ll meet his mammoth release clause if he wants to quit the Nou Camp.
United are in the market for a new forward this summer.
Zlatan Ibrahimovic has left the club after suffering a long-term injury.
Meanwhile Wayne Rooney is expected to pack his bags after an underwhelming 12 months under Jose Mourinho’s stewardship.