Frank says Rodgers and his management staff have done very well at the King Power Stadium by transforming the Foxes into a top side.
Leicester City have been fighting at the top end of the Premier League table since Rodgers joined the club in 2019.
Despite narrowly failing to qualify for the Champions League in the last two seasons, Rodgers’ side won the FA Cup for the first time in their history when they beat Chelsea for the honour in May.
Leicester have not had a bright start to the 2021/2022 season so far but Frank is backing them to challenge for the top four once again.
"Brendan Rodgers and his coaching staff have done a fantastic job the last couple of years," said the Danish head coach in his press conference on Friday.
"They have come fifth, really close to those Champions League spots, playing an entertaining style of football.
"They have really developed a good side that is really dangerous and they will challenge for the top four again this season.
"They are a top side with a top manager and top staff, and we will need to be at our absolute best to get something out of the game - which we, of course, believe we can."