Nizaar Kinsella
BBC Sport football news reporter
As a free agent, Willian could move after the transfer deadline as long as there is space in squads to register him.
The 36-year-old winger has continued to stay in shape and believes he has “three or four years” left in him, saying: “I am feeling great physically and in two seasons at Fulham, I didn’t have any problems at all, so I feel completely great.
“I am working in the gym to be in good shape but, of course, it is different from training every day and being ready inside a club. But I am doing all I can to be in good shape for my next club.
“I think my level physically and mentally is great. I think I can play for three or four years more – maybe until I am 40 years old! I feel motivated and at a high level.”
He also praised Fulham and former manager Marco Silva for reviving his career after a tough spell at Corinthians.
“I only have good words to say about Fulham,” he added. “It was an amazing two years and they treated me so well. I will always be thankful to them for opening the door to play in the Premier League again.
“The owners, people who work in the club, the guys and Marco Silva – he is a great coach and person.”