Ward-Prowse entered the action at London Stadium with ten minutes to play in east London and after forcing a good save from goalkeeper Adrian with his first shot, Ward-Prowse struck in stoppage time to put the icing on the cake of a convincing win over the Hammers.
It was his first goal since his brace of set pieces against West Bromwich Albion last season, which has left the midfielder targeting more.
“To get that first one off the mark will start to put confidence into my game and hopefully I can get few more.
“It’s a good feeling to come off the bench and contribute to what was a real good team performance,” he added.
“It was a pleasing thing and just watching from the side it was a game I thought I could come into and do well. It was great for me to get the goal but I think importantly it capped off a good day for the team to get a good and vital away win.”
Ward-Prowse’s goal came after Charlie Austin and Dušan Tadić had each struck for the visitors, with the desire shown by the team owing to the success.
“That’s the pleasing thing for us,” he said. “We had a few issues in the first half, but we showed our character, we showed our belief and our determination to put what we’ve been working on into place and I think we did that to a tee today.”