American Taylor Fritz won an entertaining three-hour battle against Andy Murray 6-7(2) 6-3 6-4 in their rain-delayed match on Friday in Washington, D.C., and will face Jordan Thompson in the quarter-finals in the evening session.

Citi Open: Taylor Fritz edges Andy Murray to seal quarters berth in Washington

Venus Williams lost to Canadian Rebecca Marino in her return to singles after more than a year, a defeat the seven-time Grand Slam champion chalked up to being rusty.

Venus Williams loses against Rebecca Marino on singles return at Citi Open

Nick Kyrgios overcame early back spasms to get the better of Russia's Daniil Medvedev in a pair of tiebreakers and win the Citi Open in Washington on Sunday. The Australian won 7-6(6), 7-6(4) over a frustrated world number nine Medvedev for his sixth career ATP Tour victory.

Nick Kyrgios fights off back spasms to win Citi Open title

Former world number one Andy Murray is considering returning to singles action at Cincinnati next month, saying he is "closer than he thought" to be ready. The 32-year-old has not played singles since losing in the first round of the Australian Open in January to Spain's Roberto Bautista Agut, after which he underwent hip resurfacing surgery in a bid to salvage his career.

Andy Murray closer than he thought to singles return

John Isner has made it through the the Citi Open final three times, and looks to go seven consecutive seasons winning at least one ATP title

Isner, Monfils win at ATP Washington Open

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Citi Open: Taylor Fritz edges Andy Murray to seal quarters berth in Washington

Venus Williams loses against Rebecca Marino on singles return at Citi Open

Nick Kyrgios fights off back spasms to win Citi Open title

Andy Murray closer than he thought to singles return

Isner, Monfils win at ATP Washington Open