It will be the first top-flight meeting between the two sides on Filbert Way since September 2003, when the Foxes ran out 4-0 winners.
In 2020/21, however, Leeds have made an encouraging start to their first Premier League campaign in 16 years. Ahead of Sunday's encounter, LCFC.com takes a closer look at the three-time champions...
The manager
Experienced Argentinian manager Marcelo Bielsa has transformed Leeds United from a club on the periphery of promotion contention in the Championship into a challenging Premier League opponent.
Born in Rosario in 1955, Bielsa's playing career included spells with Newell's Old Boys, Instituto and Argentino, although it was in the dugout where he would truly make his name.
Initially starting out as a youth team coach for Newell's Old Boys, the former defender took charge of the senior team in 1990, winning the 1991 Apertura and 1992 Clausura championships.
After a spell in Mexico, meanwhile, he returned to his homeland to lift another league title – the 1998 Clausura – while coaching Vélez Sarsfield before moving, albeit briefly, to European football.
Perfecting a high-intensity 3-3-1-3 formation, a brief tenure at Espanyol was followed by six years as Argentina manager - winning the 2004 Olympics Gold medal and finishing as Copa América runners-up.
Bielsa then enjoyed a sabbatical from the game, until taking over Chile's national team, where he masterminded the country's first-ever victory over Argentina before reaching the round of 16 at the 2010 FIFA World Cup.
Despite low expectations at Athletic Bilbao, Bielsa nonetheless then reached both the Copa del Rey and UEFA Europa League finals between 2011 and 2013 at the Spanish club, before spells at Marseille, Lazio and Lille.
Throughout his career, the Argentine has managed the likes of Mauricio Pochettino and Diego Simeone who, like onlooker Pep Guardiola, credit his philosophy as a central pillar of their own managerial ideals.
The shock announcement by Leeds of Bielsa as their new manager in the summer of 2018 immediately made the football world take notice, although it would take time for the Whites to earn promotion.
After play-off semi-final heartbreak against Derby County at the end of the 2018/19 season, Bielsa stayed and was instrumental in Leeds ending last term as Championship champions.
The Yorkshire club are built in Bielsa's own image, with an incredibly organised, dedicated, but attacking, stratagem in place which is now alarming even the Premier League's sternest of defences.
The team
Leeds United's return to the Premier League, after finishing 10 points clear of West Bromwich Albion in the Championship, led to a substantial, but methodical, summer of recruitment at Elland Road, with 13 signings being confirmed by the Yorkshire outfit.
The capture of Rodrigo from Valencia set Leeds back a reported £26M in late August, while Raphinha's move, from Rennes, concluded a busy summer window for the northern giants.
Both have featured heavily in the first half of the campaign with Rodrigo making 17 appearances to date and Brazilian winger Raphinha involved in 14 league games.
Other faces to join the club included defender Robin Koch (from SC Freiburg), goalkeeper Illan Meslier (from Lorient) and Jack Harrison, who extended a loan move from Manchester City.
Regular watchers of Leeds, though, will not have been surprised to see many of their regulars over previous seasons also excelling at a higher level this time around.
Patrick Bamford's 10 league goals so far in 2020/21, including a sublime hat-trick against Aston Villa, sees the Englishman leading Leeds' scoring chart by some distance.
Elsewhere, Mateusz Klich, Ezgjan Alioski and Hélder Costa, who joined permanently from Wolverhampton Wanderers following a loan spell last term, have all impressed in the Premier League.
Form guide
The Whites come into this fixture off the back of Tuesday night's hard-fought 2-1 victory at St. James' Park. Raphinha had the visitors ahead at half-time and after Miguel Almiron hit back for Newcastle United, Jack Harrison secured three points in the North East.
That result moved Leeds up to 12th in the Premier League standings at the halfway point, having collected 26 points from their 19 fixtures. It was also Leeds' first victory of the calendar year, ending a run of three straight defeats in all competitions - to Tottenham Hotspur, Crawley Town and then Brighton & Hove Albion.
They had, however, recorded their biggest win of the season in the final game of 2020, beating West Bromwich Albion 5-0 at The Hawthorns on 29 December. Ezgjan Alioski, Harrison, Rodrigo and Raphinha were all on the scoresheet after Romaine Sawyers' early own goal.
Leeds' return to the top division, meanwhile, had started with a daunting trip to face champions Liverpool at Anfield, but Marcelo Bielsa's side delivered a swashbuckling performance on Merseyside.
Despite eventually succumbing to a 4-3 defeat, onlookers acknowledged the quality of their attacking play and the Whites followed it up with successive victories over Fulham and Sheffield United. Rodrigo's first goal for the club, on the other hand, helped Leeds secure an admirable 1-1 home draw with Pep Guardiola's Manchester City.
Previous encounters
The two sides' first top-flight meeting in 16 years came at Elland Road on 2 November. Leicester produced a stunning away performance to win the game 4-1, extending their perfect start to the season on the road.
Scoring twice in the opening 21 minutes, courtesy of Harvey Barnes and Youri Tielemans, the Foxes were pegged back immediately after the break by Stuart Dallas. But Jamie Vardy's strike and Tielemans' second - from the penalty spot - ensured a winning return to Elland Road for Leicester.
City are unbeaten in their previous five encounters with Leeds, including a 3-1 League Cup victory in 2017, courtesy of goals from Kelechi Iheanacho, Islam Slimani and Riyad Mahrez.
However, the Elland Road club hold a slender advantage over Leicester in the all-time head-to-head record, winning 47 of 128 clashes, compared to City's 44 successes.
Trophy cabinet
Leeds United's status as one of the biggest clubs in the country is proven by the three league championships sitting in their trophy cabinet.
Thanks to the goals of Mick Jones, the club's first top-tier title success came in 1969 when they pipped Liverpool to the championship by a margin of eight points.
Don Revie oversaw a period of regular title challenges at Elland Road over the following campaigns, but it would take the Whites another five seasons to lift the top prize once more.
Following three successive second-placed finishes and one third-placed standing, Leeds once again beat Liverpool to the title in 1974, before Revie's departure to manage England.
Triumphs in the FA Cup, in 1972, and League Cup, in 1968, also came Leeds' way during a halcyon period for the club's fans, but they would struggle to challenge again for almost 20 years.
After slipping into the Second Division - where they would spend eight consecutive seasons - Howard Wilkinson's men marked their second season back in the First Division with another title, in 1992.
European honours, though, have evaded them, reaching the European Cup final in 1975 and the UEFA Cup Winners' Cup showpiece in 1973. They also reached the UEFA Champions League semi-finals in 2001.
The stadium
Elland Road remains one of English football's grand old venues. While other clubs have moved to more modern environments, Leeds have remained at their current home since their inception in 1919.
With a current capacity of 37,792, Elland Road is the 11th biggest in the Premier League, but what it lacks in size, it makes up for in atmosphere, although coronavirus restrictions have denied their fans a chance to attend this term.
Three of the stands at Elland Road mark club legends with the north, south and west stands being named in honour of Don Revie, Norman Hunter and John Charles respectively.
Elland Road is further decorated by statues of Billy Bremner and Revie, which often become points of celebration for the Leeds supporters, as it did last season after promotion was secured.
Since becoming an all-seater venue, the record attendance was a Premier League match against Newcastle United in 2001, attracting a crowd of 40,287, but the venue also held 57,892 against Sunderland in 1967.
Upcoming fixtures
After visiting King Power Stadium on Sunday, the Whites host Everton next Wednesday (7:30pm kick-off) and then Crystal Palace on the Saturday (3pm kick-off).
Two away games follow, with Arsenal up on Sunday 14 February (4:30pm kick-off), before a trip to Wolverhampton Wanderers on Saturday 20 February (3pm kick-off).
The month finishes with Leeds scheduled to face Aston Villa at Elland Road on Saturday 27 February (5:30pm kick-off).
All times GMT.