Sunderland boss Roy Keane hopes to make "two or three" more additions to his squad before the summer transfer window shuts.
"I've been saying this for a while now, but we probably still need two or three players to help with the squad," said the Irishman, who is prioritising the purchase of both a left-back and a right-back despite Ross Wallace and Dean Whitehead's performances at the weekend.
"Greg Halford went down injured three or four days ago and that meant Dean had to do a job at right-back. We played Ross at left-back, and Ross is really a left winger.
"Every club will have situations where they have call on one or two players to do a job, but I still think we're a bit light in one or two areas."