Bale has been in scintillating form for Spurs in recent weeks scoring four goals in his last three games helping the North London club to occupy fourth place in the Premier League table and qualify for the Europa League last 16.
Spurs have now played twice since West Ham last kicked a ball two weeks ago at Aston Villa and so the Hammers freshness could work for them on Monday night.
A last gasp Moussa Dembele goal sealed Spurs’ Europa League fate on Thursday and Andre Villas-Boas’ side will be full of confidence ahead of the meeting.
Allardyce has been impressed with Tottenham as a whole in recent weeks but has pinpointed Bale as the difference between them and their opponents in recent games.
“They’ve been very good. The team from an attacking point of view has been outstanding,” Allardyce told the clubs official site.
“Recently they’ve lost their leading goalscorer, who is Jermain Defoe, and Adebayor has been away at the Africa Cup of Nations, so from a goalscoring point of view they’ve had to rely on one man and one man only to come up with the goods.
“That’s Gareth Bale and he’s been the major difference between Tottenham and the teams they’ve played recently.”