The Irish livewire replaced the two-goal striker at half-time at the Kassam Stadium and, despite only returning to training days earlier, showed that his eye for goal has not been dulled and stuck a spectacular effort into the top right hand corner.
"That's right, it was a good strike as well - a wonderful strike," said Glenn of Robbie's return to the limelight. "It is a shame we couldn't have put more goals in as there were certainly chances in the first half that went begging.
"It was very hot out there and the grass was very long, so it took a while to get into any momentum. There were some good moments and I'm pleased with everyone's contribution."
Glenn revealed that Jonathan Blondel, who left the field for a short while for treatment, will have an x-ray on a finger injury, while he added that Ledley King should return to training today following an ankle injury.
"Jonathan has dislocated a finger and we have to X-ray it to make sure it isn't broken. Other than that there is nothing too serious.
"Ledley missed the game because he turned an ankle, but he should train on Monday."
Glenn Hoddle agreed that Robbie Keane was always unlikely to be totally overshadowed by new boy Bobby Zamora at Oxford on Sunday.