Manchester United manager Jose Mourinho has described the current transfer market as "very strange and out of control".
The Red Devils have spent around £121m this summer, Romelu Lukaku costing around £75m from Everton, with £15m in add-ons, plus £31m on Benfica defender Victor Lindelof.
However, speaking ahead of United's International Champions Cup clash with Barcelona in the early hours of Thursday morning, Mourinho hit out at the high fees being paid for players.
"Every club is getting good players, every club is investing a lot and some clubs are paying too much and by paying too much they create a very strange and out of control market," he said. "But this is the reality now.
"I always thought the problem is not what you pay for these kind of [top] players, I don't think the problem is what you pay for Pogba, I don't think the problem is going to pay crazy for Neymar.
"I think the problem is with the other group which is a big group because players like Pogba, there is one or two [big] transfers [like that] per transfer window. The other ones are where you have 100 transfers and for me that is the dangerous area of the market.
"Some clubs are paying or they don't buy because they don't accept the numbers that are now ruling the market, or to do it they have to go the same levels and for me that's what worries me a little bit because now we speak about £30m, £40m, £50m in such an easy way."
Mourinho is still trying to land two more key transfer targets before the current transfer window shuts, with a midfielder and a wide player in his sights.
