Millwall host manager-less Aston Villa this weekend.
Nottingham Forest will face Millwall in the Championship on Wednesday.
Harris has blasted Leeds for their celebrations after equalising late on during Saturday's heated clash.
Leeds earned a late 1-1 draw against Millwall on Saturday.
Leeds travel to south London to face Millwall next Saturday.
Millwall received a massive profit when they sold midfielder George Saville to Championship pacesetters Middlesbrough this summer.
Millwall host Derby County at The Den this weekend.
West Bromwich Albion considered Brentford's Dean Smith as Alan Pardew's replacement but could Bristol City, Millwall or Preston bosses also interest them?
Millwall manager Neil Harris confirmed that the 38-year-old is not quite up to scratch in terms of fitness but should be there in a couple of weeks.
Leeds United lost against Millwall at Elland Road in the Championship this afternoon.