Sunderland haven't hit top form yet this season, with too many defensive errors plaguing Gus Poyet's Black Cats so far, even if Saturday's 0-0 draw with Liverpool was a boost.
Goalkeeper Vito Mannone was dropped after a number of mistakes, whilst experienced centre back pairing Wes Brown and John O'Shea have also been error-prone.
Loan signing Sebastian Coates has also failed to get going since signing from Liverpool, which means manager Poyet may look to add another defender.
Reports suggest that Palermo centre back Ezequiel Munoz could be on Poyet's radar, with a £4m bid allegedly enough to lure the Argentine to England.
Munoz, 24, is a strong defender who is also good in the air for his relatively small stature, and has impressed with Serie A side Palermo since his 2010 move from Boca Juniors.
Munoz would add some youth and athleticism to an ageing Sunderland centre back pairing, but they reportedly face interest from other clubs around Europe.
Yet Uruguayan Poyet is hoping that his links with South American players will help swing the deal in his favour, having already landed a number of South Americans during his reign at the Stadium of Light.
Oscar Ustari, Santiago Vergini, Coates, Ricardo Alvarez and Ignacio Scocco have all been snapped up by Poyet since arriving on Wearside, and his influence could help Sunderland grab some much needed defensive reinforcement.