Matthew Hobbs, BBC Sport:

Jack Grealish’s signature is a real coup for David Moyes, but will the 29-year-old be more effective on the left or in a central role for the Toffees?

According to Opta, Moyes commonly employed a 4-2-3-1 formation in the Premier League after returning to Goodison Park last season, doing so 11 times in 19 matches and only really deviating when a back three was used instead.

Grealish has predominantly had a left-sided role during his top-flight career, spending 80% of his 5,698 Premier League playing minutes on the left wing at Manchester City.

In the top flight at Aston Villa, he played on the left 64% of the time, and 20% at number 10.

While Grealish is a statement signing sure to excite supporters, it does create an imbalance in Everton’s squad, with the search for a right-winger so far unsuccessful.

Iliman Ndiaye played 2,350 minutes on the left wing last term and finished as the club’s top scorer, while Dwight McNeil has also been a key performer in that role.

Should Grealish start on the left it may mean Ndiaye, McNeil and summer signing Carlos Alcaraz competing for the number 10 berth – or one playing out of position until a natural right-winger is recruited.

Moyes typically demands hard work off the ball, so if Grealish plays centrally in a position operated by Abdoulaye Doucoure last season, he may be required to do more defending than perhaps suits his natural game.