Spurs major concern after three defeats in four games is the availability of Lennon who could be missing for at least a fortnight - the club fears Lennon may be out of action for as much as several weeks.
Spurs boss Martin Jol is worried the winger may have damaged cartilage of the knee and could face an operation, which could rule him out for that period which includes Tottenham's first round UEFA Cup clash with Slavia Praha.
The other major concern is that the problem may turn into something even more serious than that.
Sources: Neil Custis in The Sun/Martin Rogers in the Daily Mirror/Guy Hodgson in The Independent