Falcao made a huge impact at the Portuguese side last season, scoring 38 goals, including a record 17 in the Europa League.
"I am leaving things up to my agent. I am very calm about the situation but I know there has been some movement," Falcao is quoted as saying by the Daily Mail.
"My ambition is to keep working hard and I am convinced I can play in a superior league like England. If Chelsea is interested in me then all that needs to happen is for negotiations to take place."