Wednesday chief Jos Luhukay would like the summer transfer window to close earlier.
English Football League clubs voted in February to bring forward the deadline from August 31.
Now the market will close just after the opening round of league matches two weeks on Thursday at 5pm.
Clubs outside the top flight will still be able to sign players on loan until 31 August.
Although Luhukay feels it is a positive step in the right direction, the Dutchman wants an even shorter transfer window.
He told The Yorkshire Post: “The transfer window closing earlier is a good thing. It could be earlier, that is my thinking. I say all of August be closed.
"You then begin the competition with everyone working with the team they have. It is bad for a coach when the squad can change after the season starts. You plan and those plans have to change.
“Having the whole of August makes it difficult – especially with the last few days all being about transfers. It is not completely closed after August 9 with the loans possible. I have no problem with that."
After three years of big spending, Wednesday have been forced to trim their squad and high wage bill this summer in an attempt to comply with Profitability and Sustainability regulations.
The Owls, who have yet to add to their squad, have sold Jack Hunt to Bristol City and allowed Jordan Rhodes to join Norwich City on loan to cut their costs.
"The transfer window is open until August 9 so we must wait to see what happens," said Luhukay, who takes his Wednesday side to Mansfield Town tomorrow night for their penultimate pre-season friendly. "The window is unpredictable."