Sheffield United manager Chris Wilder expects West Ham United to thrive under David Moyes ahead of their meeting on Friday.
The Hammers are two from two since the Scot replaced Manuel Pellegrini.
Asked if Friday's meeting at Bramall Lane would be different to their 1-1 draw in October, Wilder replied: "I believe they will be, yes.
"It will be a different type of game to the one in London. There's a different manager, a different message going into the players. They had a fabulous performance and result in their first game and then won away in the FA Cup.
"Looking at the manager's CV and what he's done, David Moyes is a hugely-respected figure in the game. His record from Preston to Everton for all those years was incredible - Everton were top six continually.
"The vast majority of his career he has been successful. With the attributes that he will bring to a talented group of players, I wouldn't bet against them staying up.
"We will be playing a West Ham team that has designs on climbing the table and I'm sure they will do that under David Moyes."