Keane will be out for six weeks with a knee injury.
Jol told Sky Sports News: “He’s out for the next five or six weeks.
“That is a blow.
“It’s his knee ligaments. He scored the winner with probably his second touch but had to come off. He did his work then we had to take him off.
“He’s a quick healer and the indications are he could be back maybe after four weeks but normally he’d be out for five or six weeks.”
Jenas will be out for around four weeks with a ankle injury.