Aug 11 (Reuters) - World number one Aryna Sabalenka kept her Cincinnati Open title defence alive by claiming a 7-6 (3) 4-6 7-6 (5) victory over Emma Raducanu in a marathon third-round clash on Monday, while men's top seed Jannik Sinner overcame Canadian Gabriel Diallo.

Emma Raducanu was knocked out of the Cincinnati Open after a battling performance saw her slip to a narrow third-round defeat against world number one Aryna Sabalenka. Monday's match was the pair's second meeting of the year after Sabalenka edged to victory in their third-round encounter at Wimbledon.