The manager would no doubt love a repeat performance of our last outing - when we were 2-0 up inside seven minutes, 3-0 up in 20 and 4-0 up by half-time against Newcastle.
That stretched our current run to just two defeats in 23 matches in the Premier League and we sit proudly in third place as we make the short trip to N5 for a 1.30pm kick-off on Sunday.
"Arsenal have had a bad week with the Milan game and then Sunderland, but they've got good players and they are a good side, so we'll have to be at our best," said Harry.
"It's important we start well.
"You go into a game like that, they've not been in such good form and it's important you get off to a good start.
"We don't want to give them an early start, their tails are then up and the crowd gets right behind them.
"We want to make sure in that first 15, 20 minutes or so that we get hold of the ball if we can and look frustrate them early in the game, maybe get that anxiety coming through from the crowd."