The Portugal winger says he will make a decision "in the next few days" whether he will stay at Old Trafford or leave the club he joined in 2007
The Portugal international suffered a disappointing campaign last season, featuring in only 11 Premier League matches due to injury and loss of form as well as being sent off in the club's defeat to Real Madrid in the Champions League.
Nani's contract at the club is set to expire next summer and the Portugal international insisted he is uncertain where his future lies.
"I have not yet decided where I am going or if I am going," Nani told RTP.
"In the next few days I will decide my future."