Zverev to face brother for first time as Murray rolls on at Citi Open

After a combined 539 main-draw matches between the German brothers, Alexander and Mischa Zverev will finally go head-to-head at tour-level.

Alexander, 21, won the second set of his rain-postponed clash with Malek Jaziri 6-2 6-1 on Wednesday, while 30-year-old Mischa saw off wildcard Tim Smyczek 6-2 7-6 (8-6) midweek.

"I don't know him much because it's the first time we're playing," joked Alexander, who previously faced Mischa in qualifiers. "It's definitely not just another match, I think, for both of us... It's going to be very, very interesting for our family.

"It's a special day because not a lot of families can say that two brothers played against each other on such a high level... Obviously we both want to win. We won't give each other anything."

Mischa added: "I think it's going to be an interesting day."

Former world number one and three-time grand slam champion Murray also progressed to the round of 16 after outlasting fellow Brit and fourth seed Kyle Edmund in DC, where rain wreaked havoc again.

Murray – back on the hard-court circuit for the first time in 17 months – claimed a gruelling 7-6 (7-4) 1-6 6-4 win over Edmund to earn a showdown with Marius Copil, who stunned 14th seed Jeremy Chardy 6-4 6-4.

Belgian third seed David Goffin made it through after prevailing 6-2 1-6 7-6 (7-5) against Pierre-Hugues Herbert, Australian Open semi-finalist and eighth seed Hyeon Chung rallied to beat Marcos Baghdatis 6-7 (2-7) 6-4 6-3, and Kei Nishikori was too good for Donald Young 6-3 6-4.

French sixth seed Lucas Pouille was leading 6-7 (2-7) 6-4 3-0 when compatriot Vincent Millot retired, while there were also three-set victories for fellow seeds Denis Shapovalov and Stefanos Tsitsipas as Frances Tiafoe advanced in two.