Manchester United boss Ole Gunnar Solskjaer concedes they're running out of time to add to his squad.
Solskjaer does want to make further additions, although he refused to give any further details.
"You need to speak to Ed [Woodward, executive vice-chairman] or others," he said after victory over Perth Glory.
"We are working, as I said before.
"Timing is an issue but we are optimistic."
