Smith batted as low as number nine on Test debut and has taken every spot up to number three in the course of a prolific career. Now he will head the innings for the first time having publicly pitched to replace Warner.
The 34-year-old’s move will accommodate the return of all-rounder Cameron Green in the top six for the forthcoming series against the West Indies, with Matt Renshaw picked as reserve batter and Cameron Bancroft’s hopes of returning to the Baggy Green fold dashed.
Head selector Andrew McDonald indicated all parties view the switch as a long-term move and praised the former captain for embracing change after 105 Tests and almost 10,000 runs lower down the order.
“It’s selfless that someone who’s had such success in one position or a couple of positions in the middle order, that he’s willing and hungry to have a crack at something different,” McDonald told reporters.
“For someone who has achieved as much as he has over such a long period of time across all formats, it’s a challenge or an itch he’d like to scratch and ultimately for us, as a team, it’s something that fits.
“It provides an opportunity to slot Greeny into number four where he’s had success for Western Australia. Ultimately we are trying to pick our six best batters.
“The regard in which we hold Cameron and the way the rest of that batting order is functioning left us feeling we have someone we think is pretty talented who was potentially going to find it pretty hard to get any Test cricket in the next 12 months or so.”
The tourists ended day three 35 without loss at stumps after 16 overs, with Kraigg Brathwaite on 19 and first innings centurion Tagenarine Chanderpaul on 15 needing a further 274 runs on Saturday.
Earlier, day three started with the West Indians resuming their first innings at 234 for 7. They added just one run from a no ball before their innings ended in the second over of the day.
Paceman Mark Steketee (3-33) trapped Alzarri Joseph lbw and two balls later had Jayden Seales well caught at second slip by Peter Handscomb. With Raymon Reifer unable to bat, West Indies ended on 235 for 9.
The PM's XI then reached 221-4 off 70 overs before captain Josh Inglis’ declaration set the Windies 309 to win.
The innings was declared four balls after Renshaw reached his 17th first-class ton, scoring 101 not out off 218 balls.
The 26-year-old, who played the most recent of his 11 Tests in 2018, added 145 for the third wicket with Peter Handscomb, after the Windies had reduced the home team to 13 for 2.
Renshaw, who also top-scored with 81 in the first innings, hit nine fours in the unbeaten knock.
Handscomb, who scored 55 in the first innings, was bowled five minutes before the dinner break by spinner Kraigg Brathwaite for 75.
Having won the toss and elected to bat, the Prime Minister’s XI got a solid start as openers Matt Renshaw and Marcus Harris shared in an opening stand of 134 inside 42 overs.
Jayden Seales broke the partnership when he had Harris caught by Kyle Mayers for 73.
Renshaw made 81 for the Prime Minister’s XI, who also benefitted from 55 from the bat of Peter Handscomb as the home side looked set for a score above 400 at 250-4.
However, Roston Chase led the West Indies fightback when he dismissed Aaron Hardie for 23 and then removed Handscomb as the Prime Minister’s XI slipped to 253-6.
Alzarri Joseph then bowled Ashton Agar for 33, Michael Neser for 10 and Joel Paris for two with the last ball of the day to finish with figures of 3-52 from 17.3 overs.
Chase’s two wickets in 21 overs cost 72 runs while Kemar Roach, Mayers and Raymon Reifer had one wicket each.