Adam Forshaw admitted that a comeback in front of a sold-out Millwall audience on Saturday would introduce him into a unique rivalry while he waited until Marcelo Bielsa ended his injury layoff.
Forshaw is offering the Leeds squad for the first time this season on the new den after he returned from the broken foot that put him offside in July. The midfielder watched from the stands while Leeds climbed to the top of the champions table last month with an unbeaten six-game performance, but he has strengthened Bielsa's team in the same week that the United head coach lost £ 7m striker Patrick Bamford to a serious knee problem.
Bamford will miss the next four months with damage to a posterior cruciate ligament, which puts Leeds at the forefront of a lack of proven competition for Kemar Roofe.
The club is not expected to be covered by the coupling of free agents on the market, with Bielsa planning to use the youngsters Tyler Roberts, Ryan Edmondson and Jack Clarke until the turn of the year.
Bielsa has serious doubts about Gaetano Berardi for Millwall due to the knee injury suffered by the defender in a scoreless draw against Middlesbrough two weeks ago, but Pablo Hernandez resumed training during the international break after a brief absence and Forshaw's success in the return on schedule is an extra bonus.
Leeds will try to run a run of four consecutive defeats this weekend at Millwall, a site where they have had a particularly bad record in the last decade.
There is no game like Millwall but we will see. I'm not sure (because I was in Bielsa's team) and I do not control myself in or out.
Millwall announced yesterday that they had sold all remaining tickets for the game.
The experienced Forshaw, who came from Middlesbrough to Elland Road in January, said: "They are all good matches in the championship, it is so competitive, but there is a little extra added between the two clubs.
"There is no game like Millwall but we will see, I'm not sure (because I'm in Bielsa's team) and I do not decide to go in or out, I just take it day after day. fitness and work hard. "
It is unlikely that Forshaw earns more than a place on the bank at Millwall after Mateusz Klich has risen and replaced him with a series of impressive performances from the past month.
Klich wore his club form to the international scene and scored the equalizer in Poland's 1-1 tie on Tuesday-evening with the Republic of Ireland.
Millwall manager Neil Harris and his players have since this week announced the visit of United after losing their last three league games.
Yesterday, striker Lee Gregory said: "It's all about starting fresh and a game to come back in. Leeds home is one that does not get much bigger for Millwall."