From the acropolis museum placard:
The metopes of the Parthenon were the first architectural sculptures to be fixed on the temple during its construction. The Centauromachy, or battle of the Centaurs, a favourite subject of the Athenians, metaphorically depicts the fierce struggle between civilisation and barbarism.
South metope 1 was taken down from the Parthenon very recently, after 25 centuries, to be preserved and exhibited at the Museum. The Centaur dominates the scene and gives the impression of being the victor. The blow, however, that her receives no the left thigh where the hole made by the spear of his Green opponent is preserved, is certainly serious. Like corner metope 32 on the north side, corner metope 1 on the south side is the work of a great artist