Grayson said: "It was a game we got back into after a very quiet start. We wanted to keep the crowd quiet and did that for 10 minutes until they scored. But after equalising we were on top.
"We were still on top when they scored the winner but I'm disappointed we switched off for their first goal and have allowed a long ball to open us up for their winner.
"We have ended our unbeaten run but know we have to start on another in our next match after the cup game against Arsenal. That is a big game for us and everyone wants to play in it. We will go there to enjoy it and see where it takes us."