Celtic boss Neil Lennon is hoping to bring in new talent into the club before the end of the transfer window, but has admitted that the exact scale of his summer spending will depend on whether the Old Firm club qualify for the Champions League group stage.
If the Hoops fail to qualify for Europe's biggest competition, however, they will need to sell players before they can buy, says the Northern Irish manager.
"The extent to which we can spend will depend if we can bring capital in from sales as well," Lennon told Sky Sports.
"If we get into the Champions League, and it's a big 'if' we'll have two days of being very busy. If not, if we do sell a player, there will be funds available for freshening up."
Celtic kicked off their Scottish Premier League season on Saturday, when they narrowly overcame a strong Aberdeen side thanks to a slip up from the Reds keeper.
He added: "We have good quality in the squad, but it's always good to add a little jag here and there.
"I'd like to add one in defence and a centre forward if we can. We will see what happens."