Nani, 25, has also reportedly become frustrated after the collapse of talks regarding a 4-yr deal.
"The club did not think his form at the end of last season put him in a very strong bargaining position over a new deal. Monday was hardly his best either," The Sun quoted a United spokesperson, as saying.
Nani currently has two years left on his 90,000 pounds-a-week deal but wants in excess of 130,000 pounds.
"There was an intention to get him on a new four-year contract. But initial demands from Nani's side were way over the top. Right now United are happy to leave it until next summer unless his demands are dramatically dropped. But they won't sell unless silly money comes in," the spokesperson added.
Zenit St Petersburg have shown interest to rope in Nani, but United are going to consider selling unless they get an offer of more than 25 million pounds, the report said. (ANI )