"I have less than one year to return the national team before the World Cup finals.
"At whichever club that may be, I will get an opportunity. Here at United, there is less chance.
"Last year was my most frustrating at United. It is something we do not want to forget because we can use it as motivation.
"My agent has said there may be some possibility of a move to Benfica. But there hasn't been great demand."
From Sky Sports:
Celta Vigo now look to be favourites for Kleberson with Benfica switching their attentions elsewhere and Sporting only interested in a loan switch.
The Spanish side are planning for life back in La Liga after winning promotion last season and they have made Kleberson one of their top targets.
Celta Vigo director of sport Felix Canero is hopeful a deal can be done for Kleberson.
"We are very optimistic about the possible arrival of Kleberson," Canero told skysports.com.
"In the next week all could be decided."