David Moyes's sorry Sunderland were relegated from the Premier League after a 1-0 home defeat by Bournemouth at the Stadium of Light on Saturday.
Allied to Hull City's 0-0 draw at Southampton, the result left Sunderland 13 points adrift of safety with only 12 points to play for this season.
"I'm really disappointed," said Sunderland manager Moyes. "I feel for the supporters. They put their heart and cash into the team and my thoughts are mainly with the supporters."
Josh King scored the goal that condemned Sunderland to the Championship, converting a pass from Ryan Fraser after a sweeping counter-attack in the 88th minute.
Southampton had a chance to give Sunderland a stay of execution, but Dusan Tadic's stoppage-time penalty was saved by Hull goalkeeper Eldin Jakupovic.
Ask if he will remain in his post, Moyes replied: "To think about it and talk about it now is just too quick.
Sunderland have been in the Premier League since 2007, but their return to the second-tier Championship has long appeared only a matter of time.

Sunderland's Jermain Defoe and Victor Anichebe look dejected
Reuters They have been in the relegation zone since September and have not moved off the foot of the table since January.
Victory effectively secured Bournemouth's safety, catapulting Eddie Howe's side up the table to 10th place, 10 points above the relegation zone.
Hull's draw at Southampton left Marco Silva's side three points clear of danger, ahead of third-bottom Swansea City's trip to Manchester United on Sunday.
After a forgettable encounter at St Mary's, Southampton were awarded a penalty at the death when Alfred N'Diaye was penalised for holding Maya Yoshida.
Tadic drilled his spot-kick towards the bottom-right corner, but Jakupovic plunged low to his left to turn the ball away and condemn Sunderland to the drop.

Hull City's Eldin Jakupovic saves a penalty from Southampton's Dusan Tadic
Reuters With Stoke City and West Ham United also drawing 0-0, the only other goal in the four afternoon games came in outgoing champions Leicester City's 1-0 victory at West Bromwich Albion.
Jamie Vardy settled the game in the 43rd minute, rifling home his 15th goal of the season from Shinji Okazaki's pass down the inside-right channel.
After an arduous season for Leicester, last season's fairytale champions have now reached the 40-point mark that usually guarantees survival.
Burnley also took a giant stride towards safety after their first away league win of the season, a 2-0 success at Crystal Palace, left them on 39 points.
Ashley Barnes gave the visitors an eighth-minute lead, before substitute Andre Gray's goal five minutes from time put the result of Saturday's late kick-off beyond doubt.
Leaders Chelsea travel to Everton on Sunday looking to preserve their four-point lead over second-place Tottenham Hotspur, who host Arsenal in the last north London derby at White Hart Lane.
RESULTS:Crystal Palace 0 Burnley 2 Ashley Barnes 7, Andre Gray 85
Stoke City 0 West Ham United 0Sunderland 0 Bournemouth 1 Joshua King 88
Southampton 0 Hull City 0West Bromwich Albion 0 Leicester City 1 Jamie Vardy 43
Standings P W D L F A
Pts1
Chelsea 33 25 3 5 69 29
782
Tottenham Hotspur 33 22 8 3 69 22
743
Liverpool 34 19 9 6 70 42
664
Manchester City 33 19 8 6 63 35
655
Manchester United 33 17 13 3 50 24
646
Arsenal 32 18 6 8 64 40
607
Everton 34 16 10 8 60 37
588
West Bromwich Albion 34 12 8 14 39 43
449
Southampton 33 11 8 14 39 44
4110
Bournemouth 35 11 8 16 50 63
4111
Leicester City 34 11 7 16 42 54
4012
Stoke City 35 10 10 15 37 50
4013
Watford 33 11 7 15 37 54
4014
Burnley 35 11 6 18 35 49
3915
West Ham United 35 10 9 16 44 59
3916
Crystal Palace 35 11 5 19 46 56
3817
Hull City 35 9 7 19 36 67
3418
Swansea City 34 9 4 21 39 68
3119
Middlesbrough 34 5 12 17 24 43
2720
Sunderland 34 5 6 23 26 60
21 (Relegated)