The Old Trafford contenders
JÜRGEN KLOPP: The early favourite. Despite signing a new long-term contract with Borussia Dortmund last year, Klopp's team appear to be breaking up, with Robert Lewandowski ready to follow Mario Götze to Bayern Munich this summer.
Could Klopp be tempted to move on? He has two Bundesliga titles and a Champions League final on his CV, and his teams also play bold, attacking football.
The Real Madrid coach could land La Décima, Real's 10th European Cup, this season, but the Italian has struggled to settle at the Bernabéu and may be open to a move back to the Premier League following his Double-winning stint at Chelsea. A two-time Champions League winner and title winner in three countries, Ancelotti would be a coup for United, but he is an outsider .
Europe's rising star after guiding Atlético Madrid to the brink of a La Liga and Champions League double. Won the Copa del Rey last season and has guided Atlético into the Champions League semi-finals. The Argentinian is infamous for getting David Beckham sent off at France 98, but that is unlikely to colour United's judgment. His lack of English might.
Barring the unlikely return of Alex Ferguson on a temporary basis, Giggs is the obvious short-term option and he would heal a dressing-room of disenchanted players. A member of Moyes' coaching team – albeit a disconnected one – Giggs is hugely respected by the players and would be a popular appointment. Whether he would be the man for the long-term is less clear.
Ryan Giggs 100/30
Louis van Gaal 7/2
Jürgen Klopp 4/1
Carlos Queiroz 6/1
Pep Guardiola 9/1
Antonio Conte 9/1
Alex Ferguson 9/1
Fabio Capello 16/1
Diego Simeone 16/1