West Ham manager, David Moyes, believes Aston Villa are benefiting from an excellent summer market.
The two teams meet on Monday.
Aston Villa have started this season in good form, including a 7-2 win over champions Liverpool and Moyes expects a difficult game.
He said: “I watched them against Arsenal and they were really, really good and it shows you how far they’ve come on as a club.
“I think their recruitment’s been excellent over the summer and I think it’s given them a great chance of improving from where they were last year.”