The boss and John Gorman witnessed the Hammers' 4-4 thriller with Charlton at the Valley, seeing West Ham's attacking potency first hand. The management might also have spotted a few weaknesses to exploit in our next opponent's rearguard.
"We've got to go over there with a certain belief and make sure we cause them enough problems, to actually test their defensive qualities," reasoned Glenn. "That is one of the things we are looking to do.
"But we need to defend well ourselves, I think the balance of our game has been pretty good so far. You can say that, but sometimes it can turn against you and go the other way.
"We've got make sure we defend well, because they have proven, with Di Canio in the side, if Cole plays, that they've got players who are very offensive minded. Sinclair is playing well, if Kanoute comes back in...they've got enough players to cause you problems.
"We need to defend well over there. I'm not too sure of the record, but it was a place that was difficult when I was a player here to go and get results. I don't know if our record is that great there."
In conclusion, however, Glenn says we must travel east in a positive frame of mind.
"We've got to go over with a lot of optimism and a lot of confidence in the way we're playing at the moment."
Glenn explains that while goals will be sought at Upton Park on Saturday, defensive duties will have to be attended to very carefully.