The Lions have gone 17 games without defeat in the Championship to move themselves into the play-off places.
The Cottagers, meanwhile, have not come unstuck since December 16, some 21 games ago, and remain in contention for a top-two finish.
There will be plenty at stake, then, in a feisty London derby, with Neil Harris and Slavisa Jokanovic taking aim at a place in the Premier League for 2018-19.
|Game||Millwall vs Fulham|
|Date||Friday, April 20|
|Time||19:45 BST / 14:45 ET|
TV Channel, Live Stream & How To Watch
In the United States (US), the game can be watched live on TV via ESPN or online through the WatchESPN app.
|US TV channel||Online stream|
In the United Kingdom (UK), the game can be watched live on TV on Sky Sports Football and streamed online using Sky Go.
|UK TV channel||Online stream|
|Sky Sports Football||Sky Go|
Squads & Team News
|Defenders||McLaughlin, Meredith, Hutchinson, Romeo, Webster, Shackell, Mbulu, McNamara, Chesmain, Cooper, Toffolo|
|Midfielders||Williams, Cahill, Thompson, Onyedinma, Ferguson, Wallace, Tunnicliffe, Saville, Donovan, White, Marshall|
|Forwards||Gregory, Elliott, Morison, O’Brien, Leighton, Smith|
Harris has no fresh injury or suspension concerns to contend with heading into a crunch clash.
As a result, the Lions boss may decide to go with the same XI which has started 11 of the club's last 13 games.
Potential Millwall starting XI: Archer; Romeo, Hutchinson, Cooper, Meredith; Wallace, Williams, Saville, Marshall; Gregory, Morison.
|Defenders||Fredericks, Odoi, Ream, Targett, Christie, Djalo, Kalas, Davies, S. Sessegnon, Opoku|
|Midfielders||R. Sessegnon, McDonald, Kebano, Johansen, Cairney, Norwood, De La Torre, Cisse, O’Riley, Edun, Nabay, Thorsteinsson|
|Forwards||Fonte, Ayite, Ojo, Piazon, Mitrovic, Kamara, Elstone, Pearce|
The Cottagers have found a formula which works, and are likely to stick with it.
Jokanovic will be looking for a response to last weekend's 1-1 derby draw with Brentford, which saw his side concede a stoppage-time leveller, but is expected to keep faith with a settled team.
Potential Fulham starting XI: Bettinelli; Fredericks, Odoi, Ream, Targett; Johansen, McDonald, Cairney; Piazon, Mitrovic, R. Sessegnon.
Betting & Match Odds
Fulham are considered to be favourites with dabblebet, who offer odds of 23/20 on an away win, while Millwall are priced at 23/10. A draw is available at 5/2.
Millwall have lost just three home games all season, and the last of those was a shock reversal against Burton Albion on November 4.
Harris has found a way to ensure that his side continue to pick up points even when allowing opponents to have more of the ball, with the Lions proving to be particularly clinical when it matters most.
Fulham, in contrast, like to dictate proceedings and boast the second-best away record in the division behind champions-elect Wolves.
They have plenty of match-winning quality within their ranks, with Ryan Sessegnon the newly crowned Championship Player of the Year and loan star Aleksandar Mitrovic netting 10 goals in his last 11 appearances.