Former Manchester United defender Phil Neville believes Juan Mata is becoming a crucial player for Jose Mourinho.
Mata, 28, scored the only goal of the game as United beat Manchester City 1-0 in the EFL Cup fourth round at Old Trafford on Wednesday.
The Spain international arrived at United from Chelsea -- then managed by Mourinho -- in 2014, with Neville first-team coach at Old Trafford at the time.
"I was here [at United] when we actually bought Juan Mata," Neville told Sky Sports. "He is never...