By SABC Sport
2nd February 2024
A clearer picture over Smith's fitness will emerge next week, but in the meantime veteran George Ford has been installed at fly-half for the Stadio Olimpico showdown with Fin Smith deputising from the bench.
Fin Smith is one of five uncapped players in the matchday 23 and should all of them get time on the field, it will be the highest number of new caps awarded in a single match since Stuart Lancaster's first game in charge in 2012.
Centre Fraser Dingwall and flanker Ethan Roots are included in the starting XV while Smith, back row Chandler Cunningham-South and wing Immanuel Feyi-Waboso feature on the bench.
In a boost to England, Alex Mitchell has recovered from a leg wound to take his place at scrum-half, but the player who was expected to partner him at half-back faces an anxious wait to see if he will be involved at all over the coming weeks.
"Marcus will go back to England today (Thursday) and have further investigations later this week. He won't be available next week," Borthwick said.
"We're not sure exactly when. Hopefully he will play in the latter part of the Six Nations, but it will be a number of weeks. We'll know more next week."
Mitchell's immediate prospects of building on becoming first-choice scrum-half at the World Cup were thrown into doubt when he felt unwell as a result of the infected wound he took into England's camp in Girona, preventing him from training fully until Thursday morning.
"Our medical team took great care of him over the weekend and at start of the week to get the infection under control and he looks brilliant," Borthwick said.
"He played a lot of minutes for us during the World Cup and has played a lot of time for his club, so he is match sharp and ready to go. He looked fantastic in training today (Thursday)."
Experienced faces such as Ford, Joe Marler and Maro Itoje are present throughout the 23, but the rare inclusion of five debutants indicated the post-2023 World Cup rebuilding phase is under way, even if some of the picks were forced on Borthwick.
Dingwall starts at inside centre having been included in nine previous England squads without winning a cap, giving him the opportunity to prove he is the solution to the team's problem position.
Although lacking the raw power of the injured Manu Tuilagi and Ollie Lawrence, the 24-year-old is a classy runner who is comfortable at 12 or 13.
Roots, a former jiu-jitsu champion who qualifies for England through his father, represented the Maori All Blacks but having left New Zealand in 2021 he has proved a hit at the Ospreys and now Exeter.
If Finn Smith, Cunningham-South and Immanuel Feyi-Waboso join them on the field, it will be an injection of fresh faces not seen for 12 years.
"Each one of those guys has earned his place in the matchday 23. Each one of them is an exciting young player," Borthwick said.
"I didn't think I'd be naming a 23 with five debutants. I've asked when the last time was England named a 23 with five new caps in it!"