NEW YORK -- Rios mens gold-medal finalists will bookend a star-studded day at the US Open. Andy Murray, who dominated his opener, will headline action early at Arthur Ashe Stadium, while Juan Martin del Potro closes out the day with a compelling matchup against American Steve Johnson.Wed be remiss if we didnt mention Serena Williams also takes the court Thursday evening. Heres how you can watch Serena and keep up with the scores and stats all day.Watch every matchAt 11 a.m. ET, the first wave of matches for the day will begin on ESPN3. Click to watch.?At 1 p.m. ET, ESPN and WatchESPN begin coverage. Click to watch.?To view starting times of upcoming days at the US Open, click here.?Live scoringOur real-time scoreboard, updated stats and social handles can be found on one spot, US Open CourtCast.?BracketsFind out whos moving on (and whos not) with our US Open mens and womens brackets. ?Thursdays key matchesNo. 2 Andy Murray vs. Marcel Granollers, Arthur Ashe Stadium, not before 1 p.m. ET on ESPN (Watch)Murray was impressive in his opening-round demolition of Lukas Rosol, and it will be key for the Scot to try to win quickly after Novak Djokovic was handed a second-round walkover. The world No. 2 is on course to meet Djokovic in the final and will need to conserve energy for the Serbian, who is battling a wrist injury.No. 14 Nick Kyrgios vs. Horacio Zeballos, Grandstand, not before 5:30 p.m. ET on ESPN3 (Watch)Love him or hate him, the polarizing Kyrgios is must-watch TV. His first-round win over Aljaz Bedene didnt disappoint. Amid firing down 14 aces and hitting 43 winners, the Australian rowed with the chair umpire three times and received a code violation for almost striking a line judge with a ball in frustration. That was perhaps calm by Kyrgios standards, but you can expect more fireworks from him against the Argentine and world No. 71 Zeballos in what will be their first encounter.No. 27 Alexander Zverev vs. Daniel Evans, fourth match on Court 5 on ESPN3 (Watch)Zverev is a highly rated prospect, but Britains Evans is enjoying a breakthrough year and will be looking to match his 2011 run to the third round. With a Davis Cup semifinal against Argentina coming up, Evans will be keen to impress Great Britian coach Leon Smith, especially with Kyle Edmund flying high in New York so far by winning his first two matches.No. 1 Serena Williams vs. Vania King, Arthur Ashe Stadium, 7 p.m. ET on ESPN2 (Watch)King has the unenviable task of trying to find a way to stop fellow American Serena. King managed to win just one game in their only other encounter, at Flushing Meadows in 2014. Serena has been dealing with a shoulder injury, though she showed no signs of it bothering her as she dismissed Ekaterina Makarova in straight sets on Tuesday.Juan Martin del Potro vs. No. 19 Steve Johnson, following Serena-King on ESPN2 (Watch)Del Potro is ranked No. 142 but is playing like hes in the top 10. He is finally putting two years of injury setbacks behind him. In the Rio Olympics final, he showed he is once again a force in the mens game. The 6-foot-6 Argentine is the most dangerous threat lurking in the draw to the remaining seeds. Johnson, though, comes in playing the best tennis of his life. Joe Thuney Jersey . PETERSBURG, Fla. Marcus Cannon Jersey . McPhee said that Ovechkins father Mikhail is in stable condition after having the surgery this week and is no longer in intensive care. "Weve told him to stay as long as necessary with your dad," he said. 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The Big 4 of mens tennis is enthusiastic about the Rio de Janeiro Olympics, unlike their counterparts in golf.Novak Djokovic, Andy Murray, Roger Federer and Rafael Nadal all have participated in the Summer Games in the past, all own a medal, and all talk about that events importance to their sport every four years -- even if it already has four Grand Slam tournaments every year.Consider what Britains Murray said when he was asked about Brazil the day after winning Wimbledon for the second time.Ive loved being in the two Olympics that Ive been at, said the No. 2-ranked Murray, who won a gold in singles at the 2012 London Games. Rio is obviously a big, big goal of mine, and hopefully I can perform well there.The No. 1-ranked Djokovic won a singles bronze for Serbia at the 2008 Beijing Games, then came up just short of a medal four years ago.No. 3 Federer won a gold for Switzerland in doubles with Stan Wawrinka eight years ago, and a silver in singles four years ago.No. 4 Nadal won a singles gold for Spain in Beijing, missed London because he was hurt, and appealed to the International Tennis Federation to allow him to compete in Rio after he failed to fulfill Davis Cup commitments because of injuries.Even if this quartet owns a combined 46 Grand Slam titles, the Olympics still matter to them. Much will be made of the contrast between this groups interest in the Summer Games and what happened in golf, which will be missing Jordan Spieth, Jason Day, Dustin Johnson and Rory McIlroy in Rio.Olympic Games are the most renowned and most prominent sports event in the history of sport. No question about it. There is no bigger sports event than Olympic Games, Djokovic said. For me, as a professional athlete, its a huge honor to be part of it.Here are some things to know about tennis at the Rio Olympics:WHOS MISSINGThere are some noteworthy players who wont be there: seven of the top 20 men in the July 11 ATP rankings. That includes Wimbleedon runner-up Milos Raonic of Canada; Czech Wimbledon semifinalist Tomas Berdych; the top American man, John Isner; Australias best two tennis players, Nick Kyrgios and Bernard Tomic; and Dominic Thiem, who would have given Austria a chance at a medal.ddddddddddddIXING IT UPNo one will know exactly who is competing in mixed doubles until everyone is in Rio. Thats because the sign-in happens there. Its limited to 16 teams, and the possibilities are intriguing. The expectation is that, if hes healthy, Federer will team with Martina Hingis. And Nadal -- if healthy -- will partner French Open champion Garbine Muguruza. The bad news: It sounds as if the Williams sisters will not enter that event.AGE IS JUST A NUMBERIf 34-year-old Serena Williams or 36-year-old Venus Williams wins a gold medal, either would be the third-oldest woman to collect an Olympic title in tennis. Winifred McNair was 43 when she won womens doubles for Britain all the way back in 1920, and Hazel Wightman was 37 when she won the same event for the U.S. four years later. Each Williams already owns four medals (all gold), so adding two more -- theyre both entered in singles and doubles -- would put either in first place for most tennis medals in Olympic history. Kathleen McKane won five medals (one gold) in the 1920s.MOST APPEARANCESIndias Leander Paes will be appearing in his record-extending seventh Olympic tennis competition, pairing in mens doubles with Rohan Bopanna. Paes owns one medal, a bronze in singles at the 1996 Atlanta Games. In Grand Slam action, he has won eight titles in mens doubles, and another 10 in mixed doubles.BACK-TO-BACK?No player has won two consecutive gold medals in singles. Murray and Serena Williams will try to change that this time.---Follow Howard Fendrich on Twitter at http://twitter.com/HowardFendrich ' ' '