Norwich's odds to go down have been cut from 13/8 to 11/8 after Saturday's 1-0 defeat against Crystal Palace ended their three-match winning run.
Third-bottom Sunderland are two points behind Norwich ahead of their clash with leaders Leicester in Super Sunday's opening game.
The Black Cats, who take on Norwich next Saturday, are 4/11 to go down with a four-point gap to make up to Alex Neil's Canaries.
Aston Villa are on the brink of relegation from the top-flight for the first time in 29 years and betting is already closed on the bottom-of-the-table side joining the Sky Bet Championship ranks.
1 Leicester 69
2 Tottenham 62
3 Arsenal 59
4 Man City 57
5 Man Utd 53
6 West Ham 52
7 So'ton 50
8 Stoke 47
9 Liverpool 45
10 Chelsea 44
11 B'mouth 41
12 Swansea 40
13 W Brom 40
14 Everton 39
15 Watford 38
16 C Palace 37
17 Norwich 31
18 S'land 27
19 Newcastle 25
20 A Villa 16
Arsenal have been pushed out from 5/1 to 10/1 to win the title after Saturday's 3-3 draw at West Ham left the Gunners 10 points behind Leicester with both sides having six games of the season remaining.
The Foxes are 2/9 title favourites ahead of facing Sunderland and second-placed Tottenham, who host Manchester United on Super Sunday, can be backed at 5/1 to finish on top.
Manchester City are 12 points behind Leicester but are 50/1 (cut from 66/1) to win the title following a 2-1 victory over West Brom live on Sky Sports' Saturday Night Football.
City are now as short as 4/11 with Sky Bet to finish in the top-four ahead of fifth-placed Manchester United's trip to Spurs on Super Sunday.