Winger Chris Hall, who was on the bench last week, replaces Canadian international Winston Stanley, with Stanley going to the bench.
George Harder and Scott Benton continue their rehabilitation from injury and retain their place on the bench.
"I was really pleased with the performance last week and the credit has to go the players. With a gap of three weeks, there was always the possibility that we may have been a little stale going into the game, but the players prepared extremely hard for the match and got their reward in appalling weather conditions," said Davies.
"Newcastle had a big win last week and you have to applaud the work of Rob Andrew and his staff in galvanising the team in recent weeks. They have brought some very experienced overseas players to compliment their excellent home grown crop of youngsters and over the next couple of months they can only grow stronger.
"Vital to that is their captain Jonny Wilkinson who remains one of the finest players in world rugby and for whom 2003 will be a massive year."
Davies also commented on the change of fixture, which sees the game have a Friday night kick-off, instead of a Saturday kick-off: "Ever since we decided to switch this fixture [to a Friday night], it is a match I have been looking forward to.
"Friday night rugby at Headingley is something special and it really gives a tremendous atmosphere to the action taking place on the field."
Leeds Tykes: 15 Dan Scarbrough, 14 Chris Hall, 13 Tristan Davies, 12 Braam van Straaten, 11 Diego Albanese, 10 Gordon Ross, 9 Alan Dickens, 8 Isaac Feaunati, 7 Dan Hyde, 6 Cameron Mather, 5 Tom Palmer, 4 Chris Murphy, 3 Gavin Kerr, 2 Mark Regan, 1 Mike Shelley (captain).Replacements: 16 Matt Holt, 17 Doug Wheatley, 18 Stewart Campbell, 19 Alix Popham, 20 Scott Benton, 21 George Harder, 22 Winston Stanley.
Kick-off: 20.00 GMT