Max Mirnyi won the 1998 U.S. Open and Wimbledon mixed doubles titles with Serena Williams and lost in the finals of the 1999 Australian Open. With Williams. Miryni joined the staff of Aryna Sabalenka in January.

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.

Sabalenka's staggering tiebreak record illustrates her play under pressure but also her vulnerability in matches this year.