Millwall fell to a narrow 1-0 defeat at Watford with the victory enough to see the Hornets claim an instant return to the Premier League.
Ismaila Sarr’s penalty early in the first-half proved the difference despite the Lions coming close to delaying the Vicarage Road promotion party on a number of occasions.
Meanwhile QPR lost 3-1 to the other promoted side Norwich City at the Kiyan Prince Foundation.
The Canaries, who had lost both games since securing Premier League promotion, went ahead after 32 minutes as Xavi Quintilla’s strike punished a rare mistake by QPR keeper Seny Dieng.
Max Aarons doubled the lead in the second-half with a far-post volley three minutes after Norwich keeper Tim Krul had saved Lyndon Dykes’ penalty.
Dykes then pulled one back with 19 minutes left but Emiliano Buendia’s late third sealed victory for the league leaders.
In the day’s early Championship game, Bryan Mbeumo came off the bench to snatch a late winner as 10-man Brentford beat promotion rivals AFC Bournemouth 1-0 to confirm their place in the end of season Play-Offs.
Mbeumo’s goal 13 minutes from time was enough to earn the Bees only their second win in eight games despite the dismissal of captain Pontus Jansson for a second bookable offence early in the second period.
In League One, Joe Pigott missed a penalty as AFC Wimbledon played out a goalless draw at Ipswich Town.
Despite Ipswich keeper David Cornell making a double save along with a series of other fine diving efforts, the point maintains the Dons’ five point gap to the drop zone.
Elsewhere, Charlton Athletic fell to a first defeat in 11 games as they lost 1-0 to fellow promotion chasers Peterborough United.
Jonson Clarke-Harris’ ninth-minute goal was enough for Posh with Charlton seeing Jayden Stockley miss a first-half penalty.
The result means Charlton drop out of the Play-Off places while Peterborough now need just one more point from three games to secure promotion.
And in League Two, Leyton Orient’s Play-Off hopes are all but over after losing 2-1 at struggling Southend United.
Tyler Cordner gave Southend the lead, only for James Brophy to hit back in first-half added time before Matt Rush gave the hosts victory in the 76th minute.