[4] However, Leeds' relegation from the Premier League in 2004 had effectively ended the rivalry; the clubs only met once in sixteen years afterwards.

The clubs met again in the 2020–21 Premier League season, as Leeds United was promoted after winning the EFL Championship in 2019–20.

As predictably as the late plod of Corporal Jones' foot, when Leeds fans gather in any stand, they will sing their song about their Cockney rivals.

Both teams flitted between the First and Second Divisions in their early years, and neither won a major trophy prior to World War II.

Leeds also won 3–2 in the return fixture at Stamford Bridge that season to clinch promotion back to Division One.

In 1952, they contested a gruelling fifth round FA Cup tie which took three matches to produce a winner, Chelsea eventually prevailed 5–1 in a second replay at Villa Park.

Under the management of Don Revie, Leeds became a force in English football for the first time, capped by winning the league title in 1969.

"[14] Damien Blake of When Saturday Comes wrote that "Chelsea were The Beatles (attractive, clean-cut, fashionable) to Leeds' Stones (surly, violent, sexy, going out with Marianne Faithfull)"[15] According to John King, "Leeds were... portrayed as dour Yorkshiremen with a reputation for playing dirty... Chelsea, on the other hand, were the wide boys of London, dedicated followers of fashion.

While Leeds were drinking tea and playing cards, Chelsea were out boozing and chasing girls [but] when it came to games between the two, however, war was declared.

The Yorkshire Evening Post's reporter observed that "'Never mind the ball' seemed to be the order of the day as scything, irresponsible tackles ruffled tempers."

"[18] The rivalry intensified when they met in the FA Cup again a year later, this time a semi-final at Villa Park, which Chelsea won 1–0.

In a game with "frighteningly ruthless" tackling, Leeds goalkeeper Gary Sprake kicked Chelsea midfielder John Boyle in the face as they challenged for a high ball, a grudge which still remained when the teams met in the FA Cup final three years later.

[21] Six months later, Leeds gained revenge by beating managerless Chelsea (Docherty had resigned the previous day) 7–0 at Elland Road, their biggest ever win in the fixture.

and led twice but a late Chelsea equaliser from Ian Hutchinson took the game to a replay, the first in an FA Cup final since 1912.

Elsewhere, Charlton kneed and headbutted Osgood, Hunter and Hutchinson traded punches, and Eddie McCreadie flattened Billy Bremner with a "kung fu" challenge.

Hugh McIlvanney wrote that "at times it appeared that Mr Jennings would give a free kick only on production of a death certificate".

[26] Mick Jones put Leeds ahead again, but Osgood equalised with 12 minutes remaining and Chelsea eventually prevailed 2–1 after extra time.

The match was "marred by a string of infringements"; Trevor Cherry, Chris Garland and Terry Yorath were all booked, and Leeds lost David Harvey and Mick Jones to injury.

Both clubs enjoyed another revival in the 1990s, which coincided with a series of "ill-tempered and highly-charged" clashes as "the mutual loathing that characterized these sides three decades ago...resurfaced.

"[47] The clubs were drawn to play each other in the League Cup in December 2012 at Elland Road, which was the first competitive meeting between them in eight years.

[51] Six months after the heated FA Cup semi-final at Villa Park, Leeds notched their biggest ever win over Chelsea.

New summer signing Brenden Aaronson began the scoring as he capitalised on a mistake from Chelsea goalkeeper, Edouard Mendy.

Additionally, three former Chelsea players have managed Leeds; George Graham, Terry Venables and Dennis Wise.