Hull KR have sacked head coach Chris Chester, with his assistant Willie Poching taking charge for Fridays Super League clash at home to St Helens, live on Sky Sports. The club issued a statement on Wednesday morning that Chester had stood down with immediate effect.The statement added: The sole focus of everybody at the club at this time is on Fridays game and securing two much needed points and any further comment on the situation, future plans and expectations will follow after the weekend. Rovers fans reacted angrily at the end of the 14-12 home defeat to Wakefield Wildcats on Sunday, booing the players after a result which left them without a win after the first three Super League rounds.The loss to visitors Wakefield at the KC Lightstream Stadium was the first win of the season for last years bottom club.Hosts Rovers are ninth in the table, with just a solitary point from the opening round 16-16 draw at home with Castleford Tigers.Chester, who previously played for the Robins as a back row forward, became a coach at the club in 2009, before being promoted to head coach in 2014.In his first full season at the helm, the 37-year-old guided Rovers to the 2015 Challenge Cup final, which they lost 50-0 to holders Leeds Rhinos. Highlights of Hull KRs 14-12 Super League defeat by Wakefield at the weekend Chester almost predicted his own downfall at Hull KRs pre-season media day in January after being told he was second favourite - behind Wakefields Brian Smith - to become the first Super League coaching casualty of 2016.He said: I thought Id have been the favourite after the weekend! It comes with the territory; its part of the job and it doesnt worry me too much. Ive just got to get on with my job because its a job Im very privileged to do.While Poching will take temporary charge, the task of finding a successor will almost certainly fall to Jamie Peacock, the former England captain and Leeds and Bradford forward who took up the clubs newly-created role of football manager at the start of the season.At a press conference later on Wednesday, Poching spoke of his ambition to become a head coach. Tony Puletua carries the ball for Hull KR in the 2015 Challenge Cup Final against Leeds Rhinos at Wembley Stadium. Poching, 42, joined Rovers as assistant coach from Warrington at the start of last season, and said he is now ready to take control of a team.Im really excited, Poching said. Ive been 10 years as an assistant and Im not a head coach yet - Im just holding the fort. Its not the way I would have envisaged or liked but Ive got a job to do.Im genuinely excited to work with the players we have here. I love coming to work every day.Asked if he would like the job on a permanent basis, Poching said: Definitely. Ive waited almost 10 years for a chance to come along. Ive bided my time, Ive done an apprenticeship. I came into this gig as a coach to one day be in charge of a team and I still harbour that ambition.Watch Hull KR in Super League action at home to St Helens on Friday, live on Sky Sports 2 HD from 7.30pm. Or watch for £6.99 without a contract, on NOW TV. 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The person spoke to The Associated Press on condition of anonymity because the Lions have not announced the hiring, which was first reported by ESPN. Lombardi, the grandson of former Green Bay Hall of Fame coach Vince Lombardi, has been an offensive assistant on Sean Paytons New Orleans staff since 2007. Stan Smith Cheap Online .com) - The Pittsburgh Penguins placed forward James Neal on injured reserve Tuesday. 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 andd looking forward for a good future.ddddddddddddHere 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/HowardFendrich ' ' '