Manchester United striker Zlatan Ibrahimovic has scored 28 goals in his debut season for the club.
The 35-year-old has an option to extend his stay at Old Trafford for another year but is yet to pledge his future to the club.
It is claimed Ibrahimovic will wait to see if United qualify for the Champions League before making a decision.
Juan Mata is United’s second-highest scorer in the league this season with just six goals, while forwards Marcus Rashford and Wayne Rooney boast just six league goals between them this term.
Zlatan Ibrahimovic next club odds Thu, April 13, 2017
Where could Zlatan Ibrahimovic go next? Odds provided by Paddy Power
Play slideshow Man Utd via Getty Images 1 of 18
Click to reveal the best odds on Zlatan Ibrahimovic's future
It leaves you wondering where their goals will come from if he left
Ince on Ibrahimovic
And Ince believes manager Jose Mourinho could be in trouble of Ibrahimovic leaves.
“Without question, Manchester United have been too over-reliant on Zlatan Ibrahimovic this season,” Ince said.
“Zlatan loves the pressure of being the main man at United. That’s why he’s a great player.
“But, at the end of the day, it’s not good for the club that they are so dependent on him performing.
Get Quotes on Home Insurance
Zlatan Ibrahimovic has scored 28 goals for Manchester United this season
“You’ve got to get goals from other areas, and I don’t think United do that. Their attacking players are not contributing their quota of goals.
“The likes of (Henrikh) Mkhitaryan, (Jesse) Lingard, (Anthony) Martial, Rashford and (Paul) Pogba, these guys have to step up and help the Swede.
“United shouldn’t have to rely on a 35-year-old to win them games, no matter how great he is.
“It leaves you wondering where their goals will come from if he left – Mourinho will need to address the issue before the start of next season.”
Ibrahimovic was a free transfer from Paris Saint-Germain last summer
United have a number for transfer targets lined up this summer, with plenty of options to bring in a new striker.
Antoine Griezmann has an £85million release clause that could be triggered, while Romelu Lukaku is keen to leave Everton and could head to Old Trafford if Chelsea drop their interest in the Belgium international.
United were linked with Juventus star Paulo Dybala – but a move for the Argentine appears to be off after he today signed a new contract in Turin.
Ibrahimovic, meanwhile, is nominated for PFA Player of the Year alongside Eden Hazard, N’Golo Kante, Harry Kane, Romelu Lukaku and Alexis Sanchez.
Ibrahimovic has scored more goals than Martial, Rashford and Rooney put together this season
Paul Ince says Manchester United must resolve their striker shortage
And former United midfielder Ince says the former Paris Saint-Germain star deserves the award.
“He’s been utterly outstanding,” Ince said.
“People go on about the likes of Kante and Hazard but, when you take his age into account, and the fact that he arrived on a free transfer, I think he could be Player of The Year.
“N’Golo Kante is the best in the world at what he does, but he’s at a top of the table team – sometimes it’s too easy just to pick someone from the champions.
“If I were voting, I’d have Zlatan right alongside him, just for the circumstances of his performances this year. His first season in the division.”
Paul Ince was speaking exclusively to the Paddy Power blog.