Ince does not think his former side can totally rely on new signing Romelu Lukaku.
Ibrahimovic is currently a free agent after being released by United in the summer.
Reports suggest the Red Devils boss has decided against selling fringe players to fund final summer signing.
Mourinho confirmed United's failed attempt to sign Perisic.
Fellaini, 29, is in the final year of his contract at Old Trafford.
Paris Saint-Germain have also been linked with a move for the 23-year-old midfielder.
Ahmet Bulut is reportedly set to travel to Spain to accelerate his move away from the Nou Camp.
Perisic has been heavily linked with a move to Jose Mourinho's side this summer.
Red Devils squad good enough to win the title, Gary Neville says.
United failed to sign Perisic earlier in the summer as they were unwilling to meet Inter's valuation.
Martial's future at United has been in doubt, with the Red Devils continuing to be linked with Ivan Perisic.
Mourinho has repeatedly stated his desire to bring in four new players this summer.
Exclusive: Shaw's agent Jonathan Barnett says United are happy with the defender.
Amorim's move to United is '90 percent complete' says Antonio Jose Leite.
Redknapp questioned Rose's logic while Paul Merson believes left-back should have met with Spurs officials.
Matic reunited with Jose Mourinho after his move from Stamford Bridge in July.
Rose gave an outspoken interview hinting at a possible move this summer.
Murphy thinks Rose wants to leave London and return to the north of England.
The Swede was released in the summer but has been training at Carrington during recovery from knee injury.
Matic, 29, joined United for £40m on a three-year deal in July.
The arrival of summer signing Victor Lindelof has pushed Smalling down the pecking order at Old Trafford.
Willian says Chelsea were not ready to negotiate him 'in any way' with Jose Mourinho's side.