The Reds won 2-1, with Everton down 2-0 at the break before fighting back through a goal from Idrissa Gueye. However, an equaliser couldn't be found for the visitors.
Afterwards, Grealish said: "It was what I expected, coming here it was hostile, faster. I don't think we played well in the first-half, we came in a half-time and had a chat with the manager and then second half, we lost the game in the second half.
"Frustrating because if we had played like that, pressed like that from the start it would have been a different game. In the end we couldn't get that last goal.
"When I have watched them this season they have been so good but there has been a few times they have gone 2-0 up and then conceded two, we had the belief. We got the one back, a great finish Idrissa but we couldn't get that last goal."