Danny Mills believes Manuel Pellegrini has to take responsibility for Manchester City's FA Cup defeat by Wigan Athletic on Saturday.
City claimed the first piece of silverware of the season at Wembley at the start of the month, beating Sunderland in the Capital One Cup final, but their hopes of a quadruple were ended on Sunday as they lost 2-1 at home to Wigan, who also beat them in last season's FA Cup final.
Pellegrini rested the likes of Vincent Kompany, David Silva and Fernandinho, no doubt with one eye on the second leg of City's Champions League last-16 tie against Barcelona in midweek, and Mills believes the manager must take the blame.
He told the latest edition of Sky Sports Football Club on Sky Sports News Radio: "It should have been a comfortable victory for them. You have to give Wigan credit. They had a game plan, they played very well, but City at home, this should have been a banker for them.
"They gave it a real good go in the last 20 minutes but didn't really create too many clear-cut chances and really test the goalkeeper.
"He (Pellegrini) may well have got it wrong. He has to take a lot of responsibility. When you play against a lower-division side you know they're going to work hard, you know they're going to be organised.
"He's had one or two problems so far this season against lower-division teams. He probably went into the game thinking 'I've got more than enough to beat a Championship side' but you have to question his decisions with the mistakes that led to the two goals."
Mills believes City are capable of shocking Barca in the Nou Camp on Wednesday but if they do not, they could yet end up with only the one trophy at the end of the season, with Chelsea now nine points clear in the Premier League,
Mills added: "The side that Pellegrini picks has a chance, if they can score in the first half, nick an away goal. We know that Barcelona have fantastic players but they lost to Valladolid at the weekend, which was a massive shock, so they can be beaten.
"But City need a really big performance.
"I don't think it'll be classed as a failure (if City fail to win any more trophies this season) but it will be a disappointment from the position they were in.
"Winning one trophy was probably the minimum requirement this season but you look at their position of strength in the Premier League - if they don't go on and win that you have to think 'what's gone wrong?'"
To hear more from Mills on City and Jose Mourinho's mind games, plus the thoughts of Alan Curbishley on Tim Sherwood's comments and the future of Pepe Mel at West Brom, listen to the full Sky Sports Football Club show via the Soundcloud player below.