The flying Welshman was at his unstoppable best in Thursday night's 3-1 win against NK Maribor in the Europa League.
Bale told the Spurs website: "The lads are delighted and we've got to maintain that form now going into the Premier League.
"This is another big game. We went there last season, gave them a good run for their money and probably should have won, but it wasn't to be.
"We'll go back up there full of confidence again after playing well against Maribor.
"We know it will be very difficult on Sunday and we'll give it our all. We've played well away, we'll prepare right and hopefully we'll get the right result."