The Black Cats suffered their first home defeat of the season, with Virgil van Dijk proving to be the decisive figure at the Stadium of Light.
In the 61st minute, the Dutch centre-back rose superbly in front of the opposition goal following a Mohamed Salah corner, heading the ball into the net for the decisive 1-0.
Arne Slot's side once again displayed an inconsistent performance, transitioning from complete dominance in the first half to showing moments of uncertainty in the second. Nevertheless, these lapses went unpunished, securing a crucial victory in their pursuit of a Champions League spot.
The first half was largely defined by Florian Wirtz, who was unlucky not to put Liverpool ahead before the break. The German first threatened in the 30th minute when his long-range shot was parried with considerable difficulty by Robin Roefs. Three minutes later, Wirtz's effort struck the post. His final chance of the half came in the 38th minute, but he failed to capitalize on a poor intervention from Daniel Ballard, sending both teams into halftime goalless.
In first-half stoppage time, a contentious moment occurred when Brobbey went down in Liverpool's penalty area after a challenge from Konate. However, referee Chris Kavanagh deemed there were no grounds for a penalty.
Sunderland attempted a more adventurous approach in the second half, with some long-range efforts from Hume and Mukiele, but these were not enough to seriously trouble Alisson's goal.
After taking the lead, Liverpool created further opportunities, with two of the best falling to Ekitike in the 79th minute, whose header from a Robertson cross narrowly missed the post. Curtis Jones and Salah also threatened in the closing stages.
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