Serena Williams bowed out of the WTA/ATP Cincinnati Masters at the first hurdle on Tuesday, losing in straight sets to US Open champion Emma Raducanu as the end of her glittering career looms ever closer. 

Williams, who last week indicated that she is planning to retire after this month’s US Open, was no match for British teenager Raducanu, who romped to a 6-4, 6-0
win.