Lennon is to see a specialist as he looks to get to the bottom of his long-term groin injury.
"He is seeing a specialist tomorrow," said Spurs boss Harry Redknapp,. "We just hope we get some good news from Aaron.
"He is going to see somebody abroad and hopefully we can get somebody who can get to the bottom of the problem for him because he is desperate to play.
"It's shame for him and it's a shame for us. We all miss him, he is a fantastic player."