LONDON (AP) — West Ham and Aston Villa defeated lower-league opponents in the fourth round Sunday to stem the flow of upsets in the FA Cup. Senegal striker Diafra Sakho came off the bench and scored on an 81st-minute header to send West Ham to a 1-0 victory at Bristol City, which is in the third tier of English soccer. Villa won 2-1 at home against second-tier leader Bournemouth.Read more on NewsOK.com