Chelsea great Ashley Cole hailed the performance of James Ward-Prowse after West Ham's win against Chelsea.
The England midfielder enjoyed a winning debut, as he laid on two assists for the 3-1 win.
"Ward-Prowse is not recognised as high as he should be," Cole said on Sky Sports.
"I think he's going to improve West Ham. They're adding someone very special."
Ward-Prowse, meanwhile, said afterwards: "A dream debut, it was a special day. It's a big strength of mine, we worked on it during it the week. It was a good finish.
"You can feel the stadium pick up in energy when we get a set-piece. It's all about delivery, it's always got to be in the right area, they've got to have belief to score.
"We know we're playing against a very good team but we showed real resilience and we took our chances."