Goals from Gary Speed and Alan Shearer put United 2-0 up, Nikos Dabizas' spectacular own goal gave us late hope but the home side held on under pressure to end our six-match unbeaten run.
Boss Glenn reflected: "It was a good game of football on a difficult pitch.
"I felt, particularly in the first first half, we dominated for long periods and also dominated the latter period of the game.
"But our problem was that we gave two goals away from throw-ins, totally gone to sleep twice, and caused our own problems. We punished ourselves.
"The key for me is that I can't sit here and say we missed lots of chances because we were one step from those chances.
"We got ourselves in six or seven positions where we could have punished them if we'd have picked the right ball out. I was very pleased with how we played with the ball though."
Glenn also revealed that midfielder Darren Anderton did not travel after a bout of 'flu.
Glenn Hoddle was left to reflect on a number of missed opportunities after Sunday's 2-1 defeat at Newcastle United.