But David Wheater then gave away a penalty in the early stages of the second half to give Blackman the chance to equalise, which he duly converted to earn the Royals a point.
Freedman was pleased with his team's performance but believed his side should have had also been awarded a penalty, after two shouts of handball were waved away by referee Carl Boyeson.
Freedman said: "I felt that it was a good match and we were outstanding in the first 45 minutes.
"But fair play to Reading. They looked like a Premier League side and they counter-attacked us really well.
"I will be amazed if they aren't in the top six. We've played a really top team there and there wasn't much in it.
"They got that penalty and that was the only decision that the referee got right.
"I've seen some blatant penalties and I won't duck any questions. I've got no complaints with David Wheater's.
"But it wasn't just the penalty decisions. I felt that the flow of the game kept on getting broken up when two really good teams were playing end-to-end football.
"We can't control that, we can only control how we play. Our defending was very good at times and Adam Bogdan pulled off some wonderful saves.
"David Ngog was outstanding, that was the best 45 minutes that I've seen him play for me, and overall I'm happy with that point."