PARIS: Serena Williams made a slow but successful start Monday to her latest pursuit of a record-equalling 24th Grand Slam title at Roland Garros while US Open winner Dominic Thiem navigated a testing first-round tie against former major champion Marin Cilic.The American star is chasing an elusive 24th Grand Slam title to match Margaret Court’s all-time mark, but clay is her least favoured surface. An error-prone beginning from Williams left world number 102 Kristie Ahn serving for the first...