Bernardo Silva said Manchester City "played like under-15s" in the closing stages of their derby day defeat to Manchester United on Sunday.

City appeared to be limping towards a much-needed victory before a calamity of errors late on saw Bruno Fernandes and Amad Diallo produce a remarkable late turnaround.

The Citizens were leading until the 88th minute of the match but ended up losing 2-1, the latest in a game that a reigning champion has led in a Premier League match and lost.

Both goals were a result of sloppy defending from City, particularly the opener after Matheus Nunes gave the ball away before chopping down Diallo in the box.

Pep Guardiola's side struggled at the Etihad Stadium, managing an expected goals (xG) of just 0.91 from their 10 shots, compared to United's 1.99 from their 10 attempts.

The defeat means City have only won one of their last 11 games in all competitions, continuing the club's worst run of form since 2006, leaving Silva frustrated at full-time.

"We deserved what happened. At this level, a game or two is unlucky. We can't say this is lucky or unlucky - 10 games it's not about that," Silva told Sky Sports.

"Minute 87 in a derby, winning 1-0 and our corner ends in a penalty for them. If we make these stupid decisions with three or four minutes to go, you deserve to pay for that.

"Looking at the game, I think there was only one team that could win the game, but in the end, we lost.

"It's not one game, it's a lot of games lately. We have to look at ourselves. You can say 'Oh it's a bit unlucky', no. It's the decisions you make.

"Today, in the last minute, we played like under-15s.

"We don't want it to happen. It's a bit frustrating because, if you look at the game until the 86th minute, there was only one team that could win the game.

"Then, from a corner for Man City, you leave a centre-back, Ruben stayed, but we end up with the ball at our keeper. There's no excuse for that.

"It's quite normal that we're not very happy at the minute. Not just this game, but the last month.

"We have to do better individually and collectively because it's not the standards of Manchester City."