The lively encounter ended 1-1 after Steffen Iversen opened the scoring on nine minutes and Shaun Maloney levelled 20 minutes later.
Although describing the first half as 'disappointing', the boss was impressed with how we responded after the break and we finished the stronger - Teddy Sheringham's header struck the woodwork late on.
Glenn reflected: "Celtic played well and are a little ahead of us in tempo, they've played a league game and are a little further down the line.
"We responded in the second half and in the end, with the chances we had, we could have won it convincingly.
"We've lots to work on, lots of good things in the end.
"We played it as a testimonial and they played full-pelt. We warned the lads about that but sometimes it's human nature and we stepped out of a few tackles, were a little dozy and sloppy early on and you put yourself on offer if you do that.
"The first half was disappointing but second half we saw that we could turn the game around. We asked if we could and we did that.
"Teddy got into the box in the latter stages of the game. We changed the shape to 4-3-3 to try and split them a bit and it worked really well.
"I was pleasded with that aspect of th egame. Teddy was then allowed to come from deep, did it well and almost had a hat-trick in 10 minutes."
Glenn Hoddle was particularly pleased with our second half display in Wednesday's friendly test against Scottish champions Celtic.