Jean-Philippe Mateta and Eddie Nketiah were also on target for the Eagles, who recorded only their third top-flight win at Selhurst Park this season.

Sarr marked the occasion of his 27th birthday by breaking the deadlock on Wednesday (AEDT), turning into an empty net after Emiliano Martinez parried Chris Richards' initial header.

Morgan Rogers, who had a would-be equaliser disallowed in the first half, restored parity with an improvised finish in the 52nd minute, but Mateta's thunderous effort saw the host regain its lead seven minutes later.

Sarr's exquisite volley from a Daniel Munoz centre made matters more comfortable in the 71st minute before Nketiah's first league goal for Palace added further gloss to a brilliant win late on.

Oliver Glasner's team stay 12th, six points behind 10th-place Villa, which missed the chance to close the gap on the top four.