Paulo Sousa has questioned whether the Liverpool support will accept Brendan Rodgers' playing style.
Like Rodgers, Sousa is also a former Swansea City manager.
He told the Daily Mail: "One of the most difficult things for Brendan to achieve will be to change the culture of the fans. They are used to football that is different to the football he wants to put on the pitch.
"This is really hard to change at Liverpool. Fans are used to watching very competitive players with importance on block defending and a quick rhythm to the game with lots of action in the box.
"If the fans back him and want to change the way they see the game, they will be satisfied with his work.
"When the club owners took the decision, they knew Brendan's profile as a coach. I'm sure Brendan will be successful and with the understanding of the fans at the start he could be there for 20 years."