The Whites took an early lead through Patrick Bamford, but goals from Olivier Giroud, Kurt Zouma and Christian Pulisic earned Frank Lampard’s side all three points.
Chelsea are currently third in the Premier League table, just two points shy of league leaders Tottenham.
And Leeds midfielder Phillips singled out the ‘unbelievable’ talent of Kante and Mount from when the two teams met on Saturday.
‘As a team they were very good they’ve got very good individuals that helped them take control of the game towards the second half.
‘I think Kante was unbelievable during that game, he was everywhere and didn’t look like he broke a sweat.
‘Any second ball that dropped he was there, any 50/50 he was there, he was at the right place at the right time.
‘Without Kante they’re not the same team. Obviously, they’ve had good players come in as well, [Hakim] Ziyech went off injured, Christian Pulisic came on and got the last goal it’s just the calibre of players that they’ve got.
‘We didn’t realise how good individually some players were. Mason Mount was unbelievable. I’ve said that from day one ever since I’ve trained with him and played against him at Derby.’