The midfielder was despondent after the 3-0 defeat against Manchester United on Sunday.
But like the rest of the squad, Nabil stated: “Now we try to put it right.”
All three United goals arrived inside the first 35 minutes to leave us with an impossible task at Old Trafford.
“We’ve played well recently and it’s a shame - and we have to tell the truth - we just didn’t turn up and the game was over before we started,” said Nabil.
“I feel really bad about the game, especially for the fans and I can tell them that we will come back stronger and show a different face when we play Leicester at home.
“We have to stay strong now, take it as a lesson and work even harder in training to make sure it doesn’t happen again.”