The 25-year-old is the favourite to win the French League’s Player of the Year award this season.
Redknapp is keen on signing a left-sided midfielder, but will face competition for Bastos from Liverpool, Manchester City and Bayern Munich.
Bastos said: “I am relaxed about all the talks. I have been playing well, so there will always be clubs interested if you do well.
“I would love to stay here if we make the Champions League. But you never know at the end of the season.”
