Postecoglou said: "Yeah it was (tough physically) and it's what you expect when you come here. They are a strong team and they sit compact so you have to be patient. I thought we handled it OK. Disappointed not to get a better outcome but a tough game.
"It (Tottenham's goal) was a well-worked move. We have been working on that. A couple of other times we just weren't in the right areas.
"We are working with all the guys all the time to try to get a better understanding. I thought in the front third, some of our decision-making and clarity of thought let us down a little bit."
On Yves Bissouma, he continued: "I thought he was outstanding. Yves did the defensive work which was always going to be important today. The general effort from the lads was strong. It's a tough place to come.
"There's a lot of games to go still. I will be very surprised if all games aren't tight. Everyone is fighting for something. We have to maintain our levels."