But Italy boss Mancini, who led City to a Premier League title and FA Cup during his time at the Etihad, says his former club can not be discounted from the title race after watching them claw back a seven-point deficit to Liverpool last season.
"Do you think they could derail your season?"
White had never played a Premier League or Championship match until this season, but has made remarkable progress since being taken under the wing of Marcelo Bielsa and his coaching staff.
"We knew it when we played them in the last game of the last season and they continue doing really well".
Chelsea lost 1-0 to West Ham at Stamford Bridge, with Aaron Cresswell scoring the only goal in the second half.
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Dele Alli's loss of form was among the problems Mauricio Pochettino failed to overcome before being sacked by Tottenham, but the England playmaker is bouncing back under Mourinho.
Former Reds defender Warnock sees no reason why one of the most exciting talents in world football would not want to work with Jurgen Klopp, but wonders whether the lack of recognition for players in English football could work against those on Merseyside. We can play as two strikers or we can play one striker as well.
While Manchester City have been hoping for the Reds to slip up at some point in order to catch up, it seems they've forgotten to focus on themselves, as they dropped points to Steve Bruce's Newcastle United early on Saturday.
"It's all about the delivery and putting it in areas and timing the runs".
Mbappe has scored 10 goals and assisted a further four strikes in 13 matches for PSG so far this season.
Of players with at least 15 Premier League goals, only David Ginola (66.7 per cent) and Laurent Robert (65.2 per cent) have scored a higher ratio from outside the box than Shelvey, who has netted 11 of his 17 top-flight goals from that range.