(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 Taylor Fritz advanced with a straight-sets win over Lorenzo Sonego.

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.

Aryna Sabalenka earned a truly epic victory at the Cincinnati Open, defeating a determined Emma Raducanu 7-6(3), 4-6, 7-6(5) to advance to the Round of 16.