The new signing comes straight into the starting XI as head coach Gareth Taylor makes eight changes overall for the 11.55am GMT kick-off at St Helens Stadium.
Liverpool: Falk, Shimizu, Fisk, Clark, Woodham, Nagano, O'Sullivan, Kapocs, Bergstrom, Csillag, Holland.
The Reds host Spurs at St Helens Stadium in an 11.55am GMT kick-off and the full match will be streamed on the WSL's official YouTube channel.
Tune in below.
Gareth Taylor's side take on Spurs at St Helens Stadium in the Barclays Women's Super League on Sunday (11.55am GMT kick-off).
Our cameras were embedded with the Reds at the AXA Melwood Training Centre on Friday - take a look in the video above.
The Scotland international joins Gareth Taylor's squad on a deal until the end of the 2025-26 season.
She arrives at the Reds with a wealth of Barclays Women's Super League experience having also represented West Ham United and Manchester United before moving to Spurs in 2023.
On the national stage, Thomas has delivered a goal rate of nearly one-in-two for her country: 21 strikes in 52 senior Scotland appearances since debuting in March 2020.
"It means a lot. It's a really exciting time for me and I'm really excited to be here," she told Liverpoolfc.com in her first interview at the AXA Melwood Training Centre.
"I think it's the right fit, right now in my career. Even though it's a short loan, I'm really looking forward to be here and help this team climb the table where they deserve to be."
Watch Thomas in action with Liverpool - match ticket details here
Born in England, from an early age Thomas grew up in the USA and went on to star for the Charlotte 49ers in college soccer.
Her professional career began in France with a single season at Le Havre, before establishing herself in the WSL, initially at West Ham.
A two-year stint with the Hammers from 2019 was followed by a spell at Manchester United of the same timeframe.
Thomas then switched to Tottenham and brought up a century of appearances in the English top flight in March 2024.
The 29-year-old, who will take the No.31 shirt, added: "Results are important and that's how you get points on the table, but you look at Liverpool's performances they have put in this season, I feel they have put strong performances in.
"It's just about getting over the line and picking up points. I've got full faith in this team.
"I wouldn't have joined if I didn't think I could help and I didn't think it was a successful project going forward."
The Liverpool striker was injured in a challenge in the process of scoring the opening goal against Tottenham Hotspur and had to be substituted.
After diagnosis, an operation was completed today on an ankle injury that included a fibula fracture.
Isak's rehabilitation will now continue at the AXA Training Centre, with no timeframe yet placed on his return.
The Reds added three points to their tally on Saturday evening courtesy of a 2-1 win in London.
Second-half goals from Alexander Isak and Hugo Ekitike put Arne Slot's men ahead, while Spurs - who had two players sent off - halved the deficit through Richarlison late on.
Our cameras were around Tottenham Hotspur Stadium to bring you as-yet-unseen moments and away-end celebrations - take a look below.
Liverpool made it three consecutive wins and six games unbeaten in all competitions with a 2-1 result over Spurs in the Premier League.
Second-half goals from Alexander Isak and Hugo Ekitike put the Reds in control after the home side had Xavi Simons sent off before the break.
A nervy finale ensued, though, as Richarlison responded for Tottenham, who mounted pressure during a period of stoppage time in which Cristian Romero was also dismissed.
"It was a really intense game," said Alisson post-match. "I think in the Premier League you cannot think you are just going to easily win games, even if you have an extra player on the pitch.
"They fought a lot for the result in the last 20 minutes. But we were brave enough to keep the result.
"Of course we are not happy for conceding - the clean sheet was a big goal as well for us, to keep the consistency. But three points away against Tottenham, we take that."
The Liverpool goalkeeper said of the closing stages: "That's part of playing in the Premier League. Playing here for a while, you know that the last 10 minutes are the most dangerous ones.
"When we are in a way controlling the game, I think we could do a little bit better with the ball, bringing more threat to their defence.
"But at the end they just put the ball inside our box, they fought. Richarlison brought energy to their team, the crowd came along. But we did well defending the crosses and all the chances they had at the end of the match. We dealt with it well."
The Reds were involved in an incident-packed contest in the capital on Saturday evening as they recorded back-to-back Premier League wins.
Substitute Alexander Isak put Arne Slot's side in front in the second half and Hugo Ekitike swiftly doubled the advantage, with the hosts having seen Xavi Simons sent off in the opening period.
Richarlison later netted a consolation strike for Spurs, whose captain Cristian Romero also received a second yellow card for his own dismissal in stoppage time.
"That's true!" Wirtz told Liverpoolfc.com post-match when asked whether it was a 'crazy game' to be involved in.
"But we are happy in the end that we won, and three points [are] everything that counted, so we are happy."
On recording his first Premier League assist of the season, he added: "That was also nice. I think until minute 70 we made a very good game.
"In the first half we had a few counter-attacks against us, which we can do better from [defensively]. But all in all, [for] 70 minutes [it] was a very good game from us. They got a set-piece and we conceded a goal.
"After that goal it was a bit wild but it's always like this in these games. When they get one goal [then] they are trying to get a second one.
"In the end you just have to try to bring it to the end [of the match] and take the three points. That's what we did."
Wirtz claimed the Liverpoolfc.com Carlsberg Player of the Match award for his assist and overall contribution to the victory in London.
The No.7 believes his adaptation to the Premier League is getting better with each appearance and is hopeful of continuing to make an impact for the Reds in the coming months.
"I think I had a few good situations," said the Germany international. "I got into some good positions to create something dangerous for goals.
"It's getting better every week, I can feel this on the pitch and it makes me happy that I can enjoy the football."
Alexander Isak and Hugo Ekitike were on the scoresheet for the Reds in Saturday's Premier League clash in north London.
Hear the thoughts of head coach Arne Slot following full-time, plus those of the man voted Player of the Match by fans, Florian Wirtz.
Meanwhile, former Liverpool players Jason McAteer, Ray Houghton and Sammy Lee dissect the key events of the encounter.
The Reds claimed a third consecutive win across all competitions thanks to second-half goals by Alexander Isak and Hugo Ekitike at Tottenham Hotspur Stadium.
Earlier in Saturday's game, Xavi Simons had been sent off for the hosts, who pulled a goal back late on through Richarlison before Cristian Romero was also dismissed in stoppage time.
See extended highlights and a full replay of the Premier League encounter in the videos below.
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