Adrian Clarke is looking at key tactical talking points ahead of Matchweek 3.
The form of Keane and Mina has been key for a Toffees side yet to concede this season.
The physically imposing duo only played six times together in an orthodox back four in 2018/19.
In eight Premier League starts as a central defensive duo, they have been part of five shutouts, with two of those coming home and away against Chelsea.
Keane and Mina are a powerful pair but can sometimes be caught for pace on the turn.
They are occasionally susceptible to mobile strikers running in beyond them, as Watford's did on occasion last weekend, so they like to adopt relatively deep starting positions.
This was reflected in the way Everton performed in their 1-0 victory over Javi Gracia's side.
The Hornets had 55.9 per cent of possession but the Toffees sat back and expertly defended their 18-yard box.
Sound in their positional sense and strong in the air, Keane made nine clearances while Mina made eight, totalling 17 between them.
Aston Villa may find it futile to simply sling high balls into the box.
Dean Smith's side would be better off trying to create chances with fast football and sharp movement.
This central defensive partnership offers obvious benefits, but it may hinder Everton’s ability to squeeze up the pitch to press.
Last season Silva's men were ranked third in the Premier League for the most possession won inside the final third.
But, perhaps concerned about leaving too much space behind Keane and Mina, the Toffees did not close down Palace or Watford with quite the same intensity as they did last season.
|Everton||Per 90||PL rank|
Facing a Villa side who like to dominate matches at home, I would anticipate a relatively deep defensive block from Everton on Friday.