Saints arrive on the back of five-successive wins in all competitions and sit third in the Premier League after Saturday’s results.
“They’ve been on fire this season, won a few matches in a row now and they are in top form,” said Harry, who hit his fourth goal of the season in the 1-1 draw against Besiktas on Thursday.
“A few players have moved on but they still have top players who have come through their system. Hopefully we can perform at our highest level and get the win.
“We know what we’re up against and we all want to win here at White Hart Lane.”