Sky Bet have pushed out Manchester United to 13/8 from 15/8 to defend their Premier League title after David Moyes was confirmed as Sir Alex Ferguson's successor.
The Everton boss will take charge at Old Trafford next season after signing a six-year deal with United, and the question now becomes who will replace him at Goodison Park?
Roberto Martinez has drifted to 5/4 from 1/2 with Porto boss Vitor Pereira proving the big gamble at 7/2 from 33s.
United were outright favourites for the 2013/14 Premier League before Ferguson announced his intention to stand down, but are now the same price as rivals Manchester City as punters happily oppose the champions.
Chelsea, who are 1/14 to appoint Jose Mourinho as their next manager, have shifted the most significantly in the market, coming in from 7/2 to 11/4 with a renewed assault on the title expected after they all but secured Champions League football for next season earlier this week.
Sky Bet have opened up several United specials following Moyes' appointment, including where they will finish in the Premier League next season and which trophies they will win, offering 150/1 for a repeat of the infamous treble of 1999.
Sky Bet's PR director Dale Tempest said: "Moyes seemed the obvious choice but you can't get away from the fact that he has not won a major trophy, so the pressure will be on if he fails to win one early in his tenure.
"It comes in contrast to Chelsea, whose odds have shortened with Mourinho expected to arrive this summer, while Manchester City are sure to come back stronger after relinquishing their title."