Gallas looks increasingly doubtful for next week's Champions League game at the Bernabeu after breaking down with a knee injury while Bale is struggling to recover from a hamstring problem.
Ledley King (groin), Younes Kaboul (thigh) and Jonathan Woodgate (calf) are also out, leaving Michael Dawson and Sebastien Bassong as Spurs' only two fit centre-halves.
Tom Huddlestone could play his first match in almost five months after coming through a friendly against Barnet unscathed.
Source: PA
Source: PA