The Great Britain manager hailed some "solid performances" as his side earned a 3-1 victory over the United Arab Emirates at Wembley that takes them top of Group A
Goals from Ryan Giggs, Scott Sinclair and Daniel Sturridge were enough to see off their Group A opponents, and the team now head into their final group stage encounter against Uruguay knowing that just a point will see them qualify for the quarter finals.
Pearce, who opted to leave both Sturridge and Sinclair on the bench ahead of kick-off, looked on contentedly as both his substitutions added to Giggs' first-half opener - but afterwards admitted he was more concerned with the result than the performance.
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"Some good parts of our play I thought and some things that we've still got to work on; we won't go away from this thinking 'it was a bed of roses totally' but some real solid performances
"Certainly [Craig] Bellamy and [Ryan] Giggs, Joe Allen, [Tom] Cleverley, some real solid performances within the group. We have to build once again for the last game."
Pearce also declared that his side would not be playing for a draw in their final group game against Uruguay.
He added: "We're going to try and win every game, we've set the team up to try and do that always. I think we can improve on the performance from tonight, we always expected we would improve on the performance game by game.
"It's going to be a tough one but we've got to recover and get ready for it."