NEW YORK -- When the U.S. Open decided to give 2009 champion Juan Martin del Potro a wild-card invitation this year, it rankled American player Steve Johnson.What if, Johnson wondered aloud, del Potro was to wind up beating someone from the United States in the first round of the countrys Grand Slam tournament?That didnt come to pass: del Potro faced a fellow Argentine in his opening match at Flushing Meadows. As it happens, though, del Potros opponent in the second round in Arthur Ashe Stadium on Thursday night will be -- yes, you guessed it -- Johnson himself.As it is, Johnson barely made it to this intriguing matchup.In the first round on Tuesday, the 19th-seeded Johnson, who won two NCAA singles titles at Southern California, dropped the opening two sets and needed to save six match points before coming all the way back to beat Evgeny Donskoy 4-6, 1-6, 7-6 (2), 6-3, 6-3. Johnson saved four match points while trailing 5-2 in the third set, then two more while down 6-5 in that set.Afterward, Johnson acknowledged that he came out tight in that match because he felt the pressure of being an American playing in the U.S. Open.I shouldnt let the moment get the best of me, he said, and it did for a bit.Del Potro had a much easier time in his opening match, beating countryman Diego Schwartzman 6-4, 6-4, 7-6 (3).A little more than two weeks ago, fresh off earning a silver medal at the Rio de Janeiro Olympics, del Potro was awarded his wild card, allowing him into the main draw of the U.S. Open for the first time since 2013. He missed 2 1/2 years worth of major tournaments because of three operations on his left wrist, only returning to Grand Slam action at Wimbledon in June.Once ranked as high as No. 4, he is currently at No. 142 because of so much time away from the tour, and he wasnt high enough to gain direct entry into the field at Flushing Meadows.The worst part of my life is totally in the past, del Potro said, and Im living a good present and looking forward for a good future.Here is what else to watch on Day 4 of the U.S. Open:WILLIAMS SISTERS: Both Williams sisters will be in action, in consecutive matches on Ashe. First, No. 6-seeded Venus Williams will take on Julia Goerges of Germany in the last day session match in the main stadium. Then No. 1 Serena Williams will face Vania King in an all-American matchup to start the night session. The siblings are coming off quite contrasting first-round outings on Tuesday. Venus labored during a three-set victory. Serena, who came to the U.S. Open with questions about a sore right shoulder, looked perfectly fine during her straight-set win, pounding serves at up to 121 mph, including 12 aces. Serena is bidding for a 23rd Grand Slam singles title -- that would break a tie with Steffi Graf for the most in the Open era, which dates to 1968.MURRAY: Three-time major champion and two-time Olympic singles gold medalist Andy Murray faces Marcel Granollers in the afternoon. Theyve played seven previous times, with Murray winning six. Murray, who won his first Grand Slam title at the U.S. Open in 2012, can become only the fourth man in the Open era to reach the final of each major tournament in a season, joining Novak Djokovic, Roger Federer and Rod Laver. Murray lost to Djokovic at the Australian Open in January, and the French Open in June, then won Wimbledon in July.FORECAST: There is rain predicted for Thursday, which used to create major scheduling headaches at the U.S. Open, but shouldnt be as much of a problem now. Thats because the tournament finally has a retractable roof atop Ashe -- and the $150 million structure passed its first test, used during a match for the first time Wednesday night as Rafael Nadal beat Andreas Seppi.---Follow Howard Fendrich on Twitter at http://twitter.com/HowardFendrichAir Max 97 Shanghai . According to a report from the Vancouver Province, the Lions are expected to replace former DC Rich Stubler with defensive backs coach Mark Washington. Wholesale Air Max 97 . Datsyuk will miss Tuesdays game against New Jersey and could be sidelined longer, while Cleary will likely miss at least the next three games. Its been an injury-plagued season for Datsyuk, who has suited up for just 39 games. http://www.outletairmax97.com/air-max-97-valentines-day-2019.html . Howard Ganz, an MLB lawyer, said in a letter to U.S. District Judge Edgardo Ramos that Rodriguezs claims do not come "remotely close" to what is needed to overturn an arbitration decision in federal court. Air Max 97 Neon Seoul For Sale . A big centre with all the tools to be an elite player, Johansen paced the Blue Jackets with a standout game Saturday night. He had a goal and two assists for a career-high three points as Columbus beat the New York Islanders 5-2 to snap a five-game losing streak. Air Max 97 Ultra 17 Red . Now that hes hitting streaking teammates with pin-point passes for easy layups, Love is asserting himself as one of the true superstars in the league.NEW HAVEN, Conn. -- Miye Oni took a pass from Sam Downey and drilled a 3-pointer with 51 seconds left to break an 80-80 tie and propel Yale to an 89-81 overtime win against Lehigh on Thursday night.All five Yale starters scored in double figures, led by Alex Copelands 20 points. It was Copelands driving layup with 26 seconds left in regulation that tied the game at 73 and forced overtime. Downey added 17 points, Oni and Blake Reynolds had 13, and Anthony Dallier finished with 12 for the Bulldoggs (2-0).dddddddddddd.After Onis shot, Kyle Leufroy missed a jumper on the ensuing Lehigh possession. Two Copeland free throws 10 seconds later pushed the Yale lead to 85-80 and the Mountain Hawks (0-2) never got back to within one possession. Copeland scored the final six points for Yale.Tim Kempton led Lehigh with 30 points and 11 rebounds. Leufroy added 20 points. ' ' '