Southampton manager Mark Hughes, whose future has been the subject of increasing speculation following a run that has now seen him win just four of his 19 league games in charge, reacted furiously to yet more appalling defending from his side.
"We spoke about that and said "try to score goals".
Southampton got a little encouragement when Danny Ings was brought down by City keeper Ederson and rose to convert the spot kick in the 30th minute but on the stroke of half-time City restored their three-goal advantage when Aguero passed to Sterling inside the box and he took his time before firing home.
City won 32 of their 38 games last season, scoring a record 106 goals and amassing a record 100 points.
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"In our team we have players of good character who always want to win, always hungry, always want to improve, score goals, give assists and have a clean sheet", he continued. Hopefully he can be more ambitious and think he can improve. "He is 23 and he can be a better player".
"He is in incredible form, he is sharp, fast, clever, fighting, decisive, he can play both sides and can play in the middle and receive the ball between the lines and commit the centre-backs with a lot of aggressiveness".
"Still hes loses simple balls, like the Tottenham game when he made an awesome assist in the first few minutes but then lost a lot of balls".
City boss Pep Guardiola said the club is working on a new contract for Sane, whose current deal expires in 2021, but reports in the media surfaced linking the 22-year-old with a potential move to Old Trafford.
And Alvaro Morata also found the net twice as unbeaten Chelsea defeated Crystal Palace 3-1 to move to second on the table, two points behind the league leaders. "I am convinced that the way we play, the players we have and the determination we show, things will start to turn around".