straight to your inboxRoy Keane believes that Manchester City's lack of intensity out of possession has led to their downturn in form this season and think they will regret not signing a striker in the summer.Pep Guardiola's side sit eighth in the Premier League table ahead of their clash with Chelsea at Stamford Bridge on Sunday. Victory would take them above Chelsea and on to 29 points, four points behind Manchester United and Liverpool, with a game in hand.