Premier League experience
Ledley has had good experience in the English top flight with Palace and has 83 appearances in the Premier League under his belt.
His incredible work rate has helped him become established in the division and he has been a regular feature in the starting line-up at Selhurst Park in recent years.
Benitez will be keen to have vast experience in his squad to help them avoid a relegation battle, but perhaps are lacking a few wise heads going into the new season.
Ledley could relied upon to get straight into the starting line-up and do a consistent job in the Premier League.