Hughes was speaking after defeat at Crystal Palace.
He said: "We thought we were close on a number of occasions prior to the window opening because we thought we would get our business done very quickly.
"You get close and then all of a sudden you wake up one morning and find the deal you thought was on the table has gone somewhere else.
"That's happened to us on a number of occasions. We're still in the mix for a number of players. We haven't been able to get too many over the line."
For breaking stories and all the great banter like us on Facebook: facebook.com/tribalfootball