I can understand the sentiment that we should let Sanchez goes if he wants to leave,

[Monty92]

Yes, but we've walked away from trousering 60m quid and perhaps risk encouraging further discord among the players.
It remains to be seen how Sanchez will apply himself in this final year of his contract. Judging from his body language V Liverpool, it's anyone's guess.

I'm just saying, it's incredibly common for a key player who wants out to be told they can leave the following summer. In Sanchez's case, the blow is also likely to be softened by the huge golden handshake he'll receive in the absence of a transfer fee.