Celtic caretaker boss Neil Lennon admits he's unsure where the goals will come from when Robbie Keane returns to Tottenham.
Keane has declared he won't be extending his stay at Celtic beyond the end of the season.
"He can light up a game, change it in a second, but I was worried about him," Lennon said in the aftermath of Sunday's 1-0 victory over Hibernian, in which Keane scored a penalty. "He's got a wee bit of a knee problem, and I was thinking, 'do I take him off'? Robbie's a brilliant player, he's world class. But I don't want to rely on Robbie for goals."