Pep Guardiola's side accumulated 100 points last season but their former manager and player believes they have become more merciless
Manchester City are not assured of winning this season's Premier League title despite having shown a more ruthless streak, according to former manager and player Peter Reid.
Victory over Manchester United saw the reigning champions return to the top of the table, re-establishing their two-point advantage over Liverpool.
Pep Guardiola's side have only dropped four points this term, remaining unbeaten after 12 games and have already netted 55 goals in all competitions.
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But Reid says that despite City displaying little mercy this term, the likes of Liverpool, Tottenham and Chelsea remain contenders for the championship.