Former Premier League striker Andy Cole says Chelsea were "impressive" to eventually see off Championship Wrexham after extra-time to reach the quarter-finals of the FA Cup.
"You've got to give Chelsea credit," he told BBC Radio 5 Live's Football Daily podcast.
"A lot has been said about them this season, especially with the managerial change, but to go there and finish off a tough game was impressive.
"Wrexham showed how good they are, tested them, and pushed them all the way.
"But, the Premier League quality came through in the end.
"When you make so many changes it's never easy, but I'm happy for Liam [Rosenior] to get the result and now he can move on to a tough game in the Champions League."
Cole briefly played alongside Rosenior at Fulham, as well as his dad Leroy at Bristol City, and was full of praise for his approach.
"Liam is a genuine guy, a real nice kid, an intelligent kid," Cole added.
"For him to be at the level he is now – I'm very proud of him. It's not easy going into a club like Chelsea with a great history of sacking managers, but he seems to be getting the train back on the tracks.
"He knows it's going to be difficult for him because he wants to be accepted by everyone and ultimately he's going to find that hard but if he keeps getting results there's not a lot anyone can say."
Listen to the full episode on BBC Sounds
