By FOX SPORTS staff
The Premier League's top three sides will all be led by new managers next season, but only Moyes faces the unenviable task of retaining the mantle of title-holders.
Redknapp noted in his column for The Sun that Manchester United's incoming boss will likely be expected to win silverware in his debut season, a more difficult assignment than the one former manager Sir Alex Ferguson was presented with in his first campaign.
"Taking over from Alex Ferguson gets you about five minutes to settle in before the expectation starts piling up. He will be expected to win a first trophy in his debut year in charge of this country's biggest club. Success will be classified as winning the Premier League and/or the Champions League," Redknapp wrote.
"Moyes has got it a lot tougher to improve on this United team than Fergie did when he took over with them in the doldrums in 1986."
The Englishman also pointed out that the Red Devils' neighbours Manchester City have already signalled their intent to seize back the championship with some choice signings.
"Across town Manuel Pellegrini has made the best start so far with two great signings for City in Fernandinho and Jesus Navas," Redknapp stated.
"That's given him a bit of ground on his two rivals because at this stage it's all about the signings they make between now and August 17 that will pay dividends next May."