The Black Cats have signed seven new players this summer, with Callum Doyle, Alex Pritchard, Corry Evans, Dennis Cirkin, Frederik Alves, Nathan Broadhead and Niall Huggins all moving to Wearside.
Assistant head coach Jamie McAllister says there could be more signings to come.
"We've been patient and waited for the right quality to come along," said McAllister after Saturday’s match.
“If we can add one or two more before the window closes then that would be great, but they have to be the right players and the right fit for the club."
With Tuesday’s deadline edging closer the Black Cats’ main priorities are to look at signing another full-back or striker.
Here are seven deals that could still happen before the deadline.
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"We've been patient and waited for the right quality to come along," said McAllister after Saturday’s match.