The Addicks have collected seven points from a possible nine since the restart to move clear of the dropzone, while Millwall's playoff hopes are fading following a three-match winless run.
The three-month hiatus clearly came at the perfect time for Charlton, who had lost three games on the spin to slip into the relegation zone before the lockdown.
Since the Championship resumed last month, though, Lee Bowyer's side have beaten Hull City and Queens Park Rangers 1-0, as well as earning a good point away at Cardiff City.
That stalemate in South Wales on Tuesday in a game of few chances moves Athletic four points clear of the drop, though 22nd-place Hull City have a game in hand to play.
Safety is by no means guaranteed just yet, then, but Bowyer's men are in a far better position now than they were just a couple of weeks ago.
Millwall, by comparison, are worse off than they were during the coronavirus-enforced break, having slipped down to 11th place.
The Lions lost 3-2 at home to Derby County in their first game back and the played out a couple of draws with Barnsley and Swansea City.
Millwall have had a mixed time of things on their travels this season, placing them exactly midway in the away form table, having only won back-to-back once all term.
The Lions have a great record against Friday's opponents, however, going 11 games without defeat in this fixture since March 1996 - a run that includes a 2-1 victory in November's reverse match.
Charlton Athletic's Championship form: LLLWWD
Millwall's Championship form: DDWLDD
Millwall's goalscorer against Swansea may sit this one out, with Rowett confirming after the match that Bennett was substituted due to a back problem.
Bowyer reverted to a back five at the Cardiff City Stadium and it remains to be seen whether he will stick with those tactics.
Either way, versatile defender Deji Oshilaja is one of those pushing for inclusion for Friday's derby clash.
Charlton possible starting lineup:
Phillips; Lockyer, Pearce, Sarr; Lapslie, Cullen, Field, Forster-Caskey, Doughty; Green, Aneke
Millwall possible starting lineup:
Bialkowski; Hutchinson, Cooper, Wallace; Romeo, Woods, Williams, Ferguson; Wallace, Bradshaw, Mahoney
We say: Charlton Athletic 1-1 Millwall
Charlton have been in better form than their local rivals since returning to Championship action, collecting seven points to Millwall's two. The Lions do not tend to lose this fixture, however, and we are backing them to take a point from their trip to The Valley on Friday.