The United States moved with two victories of a record-extending eighth Olympic gold medal in women’s basketball with an 88-74 quarter-final success over Nigeria on Wednesday. Nigeria were the first Africa side to make the knock-outs but never stood a chance. The US led by 19 at half-time and 28 after the third quarter before taking it easy over the final 10 minutes. A’ja Wilson led the way with 20 points as the US extended their win streak to 59 matches. Their last defeat was in the 1992 semi-finals against the Commonwealth of Independent States. In the semi-finals on Friday they meet Austral…