The 36-year-old stopper spent four years at Old Trafford under Sir Alex Ferguson who retired last summer after 26 years in charge of the reigning Premier League champions.
However, Carroll stated this week he has never seen a Manchester United team with so little fight as the side on display in United’s lacklustre 2-0 defeat in Athens last month in the last sixteen Champions League clash.
“They've got good players but they had no hunger, no fight in the team so it was a shock in that way but not a shock the way we played. The goals we got were well deserved,” he explained.
United now have a mountain to climb in the second leg of the tie at Old Trafford this month to overturn the two-goal deficit suffered in the first leg if they are to progress through to the quarterfinals of the competition under David Moyes.
"At the end of the day you can be a good player but you have to give 100 per cent and give everything. For me Manchester United didn't give that and looked like they had no hunger and fight for the game,” he added.
"They might have slacked off since Sir Alex left, it's football…We watched a lot of Premier League games this season and knew United had not been performing. On the night when I was watching it live from the stands, I've never seen a Manchester United team like it.”
Carroll made 72 appearances in all competitions for United between 2001 and 2005 before joining West Ham where he spent another two years in the Premier League. The Northern Ireland international spent most of his Old Trafford career as back up to former France No.1 Fabien Barthes under Sir Alex Ferguson but still managed to pick up two Premier League title honours.
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