‘S-HERTOGENBOSCH, Netherlands — Canadian Gabriel Diallo, the defending champion, dropped his opening match at the Libema Open grass-court tournament Tuesday, falling 6-4, 3-6, 7-5 to France’s Adrian Mannarino. Diallo fired seven aces and won 73 per cent of his first-serve points, but Mannarino converted four of nine break-point chances in the two-hour, 30-minute match. Diallo […]