Manchester United boss Ralf Rangnick is happy seeing so many of his former players thriving - at Liverpool.
Liverpool thrashed Man Utd 5-0 at Old Trafford when the two sides last met in October.
United interim manager Ralf Rangnick has worked with a number of key Liverpool players earlier in their careers.
Midfielder Naby Keita said the German treated him "like a son" when he previously played under him at Red Bull Salzburg and RB Leipzig.
"It's no coincidence that they're as good as they are," added Rangnick ahead of Tuesday's trip to Anfield.
"Six or seven of those players used to be my, or our players, when we signed them for our clubs when nobody knew them.
"Again, it is no coincidence that this is probably the club with the highest number of players from our former clubs because their approach, their style of football, the way they want to play is pretty similar."
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