Trevor said last week that he was content at Upton Park, and Glenn says:
"He has been feeling very poorly and has been tucked up in bed for a few days, but him withdrawing his transfer request really pleases me and I am delighted about that.
"I believe it is the best thing for Trevor to do and he has made the decision without any pressure from myself because I felt had I put him under pressure, like any other human being, he might have reacted the other way and sometimes that makes you want to leave more.
"I have let him decide on his own future and I really believe he has made the right decision; Trevor Sinclair is one of several players that over the next couple of years I would like to build a good squad around.
"With careful and selective activity in the transfer market over the next 18 months hopefully we can end up with a squad that is bigger than it is now in terms of quality and a squad that can confidently start to achieve some things that we all want."
Trevor missed out on England action this week because of the illness that ruled him out on Saturday but he should be okay in time for the next domestic action against Middlesbrough.
As for Glenn, he has been keeping busy and reveals:
"I went to see an international game on Wednesday afternoon and I will be making my way up to the Riverside on Saturday, so I can personally run the rule over Middlesbrough myself.
"As good as the reports are from our own scouts and the videos that I watch of the teams we are about to play, there is nothing better than being there yourself and seeing a team with your own eyes."
No permanent transfers are imminent and neither is anyone on trial at Upton Park despite reports claiming that Shaktar Donesk defender Muamer Vugdalic was coming over, and also linking the club with Ricardo Fissore of Torino and Dominic Morfeo of Fiorentina.
"There is nothing on the agenda at the moment - nothing to be said at all," Glenn insists.
"It is well documented now that we haven't got any transfer funds between now and the end of the season; any new player will only be a player that is brought in on loan.
"Anyone brought in on that basis will only be one that can go into the first team and help us pick up results; I can't see any point of bringing in anyone on loan for two and a half months that is only what I call a squad filler."