Serena Williams's three-and-a-half year reign as world No 1 will come to an end on Monday, after she suffered a shock straight-sets defeat in New York against Karolina Pliskova. “I don’t think much went well today,” a subdued Williams told reporters after a 6-2, 7-6(5) loss at the hands of Karolina Pliskova, a first-time major semifinalist. Serena Williams