Harper will step in for the injured Allan McGregor.
"Harper will start. The exact reason why we brought him to the club was for a moment like this," said Bruce.
"We didn't want McGregor injured, but we've made sure we've got adequate cover with Eldin (Jakupovic) as well.
"It was the experience of Eldin I worried about and I wanted an experienced one. Certainly Steve is that.
"Make no mistake he's been a fabulous goalkeeper over the years. I've got no problems with him filling the breach.
"He's been there and done it for 20 years. He'll be fine. He won't be daunted by Tottenham and even at his age he'll be quietly excited about playing again in the Premier League. And why not? He's still got something to offer."
For breaking stories and all the great banter like us on Facebook: facebook.com/tribalfootball