Sam Allardyce
Sam Allardyce has been predicted a three-and-a-half year spell as England manager by the bookiesLaurence Griffiths/Getty Images

Sam Allardyce will survive the 2018 World Cup in Russia but will be replaced as England manager by Euro 2020, according to the bookies pricing up his future. The FA finally appointed Allardyce on a two-year contract on Friday after Roy Hodgson resigned as manager following England's humiliating exit to Iceland at Euro 2016.

The former Sunderland, West Ham, Newcastle and Bolton Wanderers manager was selected ahead of Steve Bruce, who has reportedly walked out on Hull City. Big Sam, who received the backing of Sir Alex Ferguson and Jose Mourinho, has made no secret he wanted the job after missing out on the post in 2006.

Allardyce's first task is to make sure England qualify for the World Cup in two years before turning his attention to the European Championships in 2020. But according to spread betting company Sporting Index, Allardyce is likely to be axed as manager before the Three Lions make it to the tournament.

According to markets it looks at, Sporting Index reckons Big Sam will last three-and-a-half years before he is given the boot - that's 1,1000 days, or 39 matches.

A term that length would be some 400 days fewer than Hodgson was at the helm and almost a whopping 900 behind Sven-Goran Eriksson, who managed England between 2001 and 2006. Allardyce will last more than 600 days longer than Steve McLaren did before he was shown the exit door in 2007, the betting company predicted.

Ed Fulton, trading spokesman for Sporting Index, said: "Big Sam has waited for the England job for much of his career, and we don't think he's going to give it up without a fight. Despite been given a two-year deal by the FA, we think Allardyce can lead England towards the 2020 Euros – if we qualify, that is."

Sam Allardyce
Sproting Index predicts Big Sam will last 1,100 days in charge of EnglandSporting Index