Alexandr Dolgopolov hits back over match-fixing allegations after beating Struff

• Ukrainian defeats talented German in five sets to reach second round
• Reporters grill him over betting pattern in previous tournamentAlexandr Dolgopolov scored a fine five-set win over the excellent German Jan-Lennard Struff to advance to the second round of the US Open on Wednesday – then reacted furiously to questions about allegations of match-fixing in his first-round loss in Winston-Salem last week.The 28-year-old Ukrainian, who has earned $498,957 in a middling season an