These players have rapidly changed the Yorkshire side's fortunes for the better this season.
Leeds United players celebrate after the match
It is fair to say that Leeds United have undergone something of a topsy turvy season so far.
After a disappointing start to the campaign and five losses from their first six Championship games, Garry Monk's side underwent a transformation in form, going unbeaten in the their next five games.
Tuesday night's defeat to Bristol City ended that run, but Monk will be happy that his impact is starting to reap rewards at Elland Road. Along with the imprint delivered by some of his summer signings, who have played important roles in steadying the ship and bringing previously lacking strengths to the side.
Here is our list of the club's five most important summer signings.
5. Eunan O'Kane
Blackburn's Martin Samuelsen and Leeds' Eunan O'Kane in action
After falling out of favour at Bournemouth, Kane made the drop down to the Championship and has been a revelation in the Leeds midfield.
The Republic of Ireland international has commanded the middle of the park in his four appearances for the club so far, and has never shied away from wanting the ball.
The 26-year-old has shown a real desire to be involved in all attacking phases of play and his impact will only continue to grow as the season progresses.
4. Hadi Sacko
22-year-old Sacko has electrified the wings at Elland Road this season, providing Leeds with a unique attacking threat in their arsenal.
The loanee from Sporting Lisbon's frightening pace has been enough to strike fear into opposition defences, and his strike in the club's 2-1 defeat to Birmingham City back in August shows he knows how to hit the net.
Add to that, his assists in wins over Sheffield Wednesday and Blackburn mean that Monk has unearthed a versatile and impactful player.
3. Kyle Bartley
One of the main problems the Yorkshire side had last season was its defensive woes, and the signing of Kyle Bartley has gone a long way in correcting that issue.
The loan capture from Swansea City's strength and defensive timing have been crucial to containing opposition attacks, and his Premier League experience has set him apart from his teammates.
It can be argued that Bartley's contribution led to Leeds' revival after five defeats from the first six, with his winning goal against Blackburn giving the club a real sense of belief in themselves going forward. The Leeds number five has been the leader the side have needed this season.
2. Pablo Hernandez
Leeds' Pablo Hernandez dejected
As far as marquee signings in the Championship go, the signing of Pablo Hernandez has certainly been the most eye catching.
The former Spain international, on loan from Qatari outfit Al-Arabi, has been a real class act for the club so far, giving Leeds that X-factor needed to get over the line at times.
The first team are more assured when Hernandez is on the ball, and his creativity has certainly helped his teammates up the ante in their own game.
Having scored with a brilliant curling effort against Cardiff City recently, the Leeds faithful have yet to see the former Swansea man at his very best, and that will be the most exciting prospect about Hernandez.
1. Pontus Jansson
Blackburn's Danny Graham in action with Leeds' Pontus Jansson
Pontus Jansson has, undeniably, been Leeds' most important signing this summer.
The Sweden international, on loan from Serie A side Torino, has been unbeatable in the centre of the Whites' defence, proving instrumental in the club's recent run of form.
His importance to the side was made very clear during Tuesday's defeat to Bristol City; after being forced off with injury, the club succumbed to their first loss in five.
The defence was visibly less at ease in Jansson's absence, which serves the ultimate tribute to his impact so early on in the season.
With Jansson in the side, Leeds' have a formidable jewel in their crown and, at this point in the campaign, he has to be regarded as Garry Monk's best signing so far.
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