With a rueful smile and a fond wave Serena Williams left the Centre Court on Tuesday night, possibly for the last time. If this was the last occasion we saw her at Wimbledon then at least she left with the indelible print of a superb contest against a poised and youthful opponent. Harmony Tan, the world No 113 from Paris, said she was scared when she saw her first round draw, but she showed remarkable composure in pulling off a 7-5, 1-6, 7-6 victory that may go down as Williams's final defeat at SW19. Going into a new deciding super...