British number two Cameron Norrie ended a six-match losing streak with a 6-4-6-1 win over Aleksandar Kovacevic in the first round of the Mifel Open in Mexico. Norrie had not won since the Madrid Open in April, a run which included a first-round exit to qualifier Michael Zheng at Wimbledon. "I'm so happy," said Norrie, who retired from his French Open first-round match in May because of a rib injury. British number two Katie Boulter was knocked out of the Citi Open in the first round, extending her losing run to four matches. American Ashlyn Krueger triumphed 3-6 6-2 6-2 in Washington DC as Boulter won only four points from 2-0 up in the deciding set.