The Juventus midfielder has been linked with several major clubs in Europe throughout the summer but United may be willing to pass on the Frenchman if they cannot strike a deal.
Sky Sports believe that the Serie A Champions have told United they must bid upwards of £100m if they are to get their man.
The Portuguese manager said: "It is the power of Man United but it is also the power of football because in this moment the market is going in such a direction where I never know what is expensive, I never know what is cheap.
"We are in a comfortable position but we know what it is wrong and what is right. We know what the balance is and, I repeat, we are not going to be only focusing on one player.”
American takeover of Swansea City is complete. (BBC)
Georginio Wijnaldum moves from Newcastle to Liverpool for £25m (BBC)
Valencia midfielder Andre Gomes moves to Barcelona. (Sky Sports)
Andre Schurrle linked with move to German giants Borussia Dortmund. (Goal)
Romelu Lukaku linked with Chelsea return. (Daily Mail)