The Hammers boss admitted afterwards that Fulham deserved their three points after an impressive display of quick passing and movement that cut open our defence but insisted that things could have been entirely different had one or two vital situations fallen in favour of the home side.
Said Glenn: "We're very disapponted to lose our unbeaten home record and I felt we were unlucky at times today.
"We started brighter and enjoyed the first clear cut chance of the game when Fredi hit the post.
"Thereafter, Fulham showed what a good passing side they are. They have played like that a few times this season and haven't got the results but today it worked for them.
"I was impressed with them, but I can't fault the effort and commitment of my players. They battled all afternoon but the second goal was an absolute killer.
"I'd like to see the video to confirm my belief that Di Canio was fouled in the build-up to their second goal - there was no way back after that."
Glenn also admitted that Fulham's opener - a header from Sylvain Legwinski just minutes before the break - provided a blow that the Hammers found hard to recover from.
"First goals normally are crucial in the Premiership, if you look at the stats it is very rare to see a team lose a match after taking the lead.
"Being a goal behind at home was a new experience for our lads, but I thought they gave it all they could and it was just one of those days in the end."