Manchester City Manuel Pellegrini admitted he wanted to substitute all 11 players at half-time as the club were given a scare in their 4-2 FA Cup victory over Watford.
The Championship side shocked their Premier League hosts as they bolted into a 2-0 lead inside 30 minutes at the Etihad Stadium.
But City, who have not lost a match at home in the league this season, lifted in the second half as a Sergio Aguero hat-trick and a strike from defender Aleksandar Kolarov secured the club a spot in the fifth round.
However, Pellegrini, who believed his team was a ‘disaster’ in the first 45 minutes, contemplated making a raft of changes during the interval.
"I wanted to change all of my players at half-time, all 11 of them," Pellegrini told a news conference.
"The whole team was a disaster in the first half. My team wants to win every game and wants to win the FA Cup.
"I was very worried at half-time because I talked with the players a lot before the match and said that, in the FA Cup, teams that play in a lower division have a lot of motivation.
"If you don't play with 100 percent intensity and desire you can lose and go out of the competition and we were jogging in the first half. If you play like that you can't win."
The Chilean boss also admitted that if Watford had been able to secure a third goal, City would have their dreams of a four-goal trophy haul this season dashed in front of their home fans.
City are second in the Premier League, have a date with Sunderland in the Capital One Cup final and face Barcelona in the Champions League knockout stages.
"The whole team didn't do the things that we normally do in the first half, the most important thing for me is Watford didn't score the third goal," said City's manager.
"If they'd have scored that the game would have been finished. But the reaction was there and we played a really good second half."