Crysencio Summerville spared West Ham's blushes as he came off the bench to score an extra-time winner against League One Burton and put Nuno Espirito Santos' side into the FA Cup last 16 with a 1-0 victory.
Summerville made it six goals in his last seven when he struck in the 95th minute of a poor contest, cutting in from the left and beating two defenders before hitting a shot which deflected off Terence Vancooten to beat Brad Collins.
