The Rio Olympics will have two new sports that didnt feature at London 2012: golf, returning to the Games after a 112-year hiatus and bereft of some of its biggest names, and rugby sevens. The former will swing into action under a cloud of pessimism but sevens could be a leading light, adding excitement and colour as a whole new audience is exposed to the game. Not sure what to expect? Heres a handy guide:What is sevens?USA Sevens head coach Mike Friday has this question nailed:Sevens is a highly skilled, fast moving, high impact attacking team ball game of seven versus seven on a full-size pitch, he said. It is a game played at high speed, has one on one big tackles, footwork and agility aplenty.The complexities of the set piece laws within the laws of rugby have been removed making it an easy introduction to the new supporter experiencing the game for the first time as they look to understand and enjoy the collisions, ball skills and spatial manipulation to control the ball and pitch.What happens during a match?? Two teams, consisting of seven players each, seek to score a try (5 points) and then add the conversion (2 points) via a drop-kick.? Each half lasts seven minutes with the match ending when the ball goes out of play or a team scores. This is extended to 10 minutes each way in the final.? The teams are usually made up of two or three forwards (two props and a hooker who form the front-row in a scrum) and four backs (scrum-half, fly-half, centre and winger/fullback).? Infringements can lead to a yellow card which sees the offending player sin-binned for two minutes.What terms do I need know?Try: A team is awarded 5 points when the ball is grounded by a player across the oppositions try line.Conversion: The team which scores a try then has the opportunity to add a further 2 points by kicking the ball between the posts from a spot in line with the try mark.Drop-goal: The ball is dropped to the floor by the player and then kicked towards the posts.Knock-on: The ball has to be passed backwards for the team to move forward. When a player spills the ball forward, the game is restarted by a scrum to the opposing team.Scrum: The method for restarting the game after a knock-on. The two groups of forwards pack down, three on three, to compete for the ball, which is put into the middle of the two sets of players.Lineout: When the ball goes over the touchline, the game is restarted by the ball being thrown back onto the field; both teams line up towards the infield either side of the hooker throwing the ball in.Where and when will the tournament be held at Rio 2016?Where: Deodoro StadiumWhen: The womens sevens is scheduled to be played across Aug. 6-8 and the mens Aug. 9-11.What are the groups?Mens sevensPool A: Fiji, USA, Argentina, BrazilPool B: South Africa, Australia, France, SpainPool C: New Zealand, Great Britain, Kenya, JapanWomens sevens:Pool A: Australia, USA, Fiji, ColombiaPool B: New Zealand, France, Spain, KenyaPool C: Canada, Great Britain, Brazil, JapanHow did they qualify?For the mens event, Brazil qualified as hosts while Fiji, Great Britain, New Zealand and South Africa booked their places at Rio by finishing in the top four of the annual World Sevens Series. Argentina, USA, France, Japan, Australia and Kenya secured their spots by winning their regional qualifying tournaments and Spain were the final team to book their place in Rio by winning the last qualifying tournament in June.For the womens event, Brazil qualified as hosts while top-four finishes in the World Series booked spots for Australia, Canada, Great Britain and New Zealand. The regional champions were Columbia, USA, France, Kenya, Fiji and Japan while Spain won the final qualifying tournament in Ireland.Who are the favourites?Fiji are expected to rule on the mens side and headed to Rio as favourites after winning the 2016 World Sevens Series. But they will face fierce competition from the USA, South Africa, Australia, New Zealand and Great Britain. 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That came on the heels of Bryan Murray taking the unusual step of going into the locker room at the Prudential Center and addressing the players himself. NHL Jerseys China . - The Oakland Raiders re-signed offensive lineman Khalif Barnes on Friday. Authentic NHL Jerseys . SIMONS ISLAND, Ga. MINNEAPOLIS -- When the season began, the Arizona Cardinals and Minnesota Vikings were expected to be among the top teams in the NFC.The two teams had Super Bowl aspirations with talented rosters coming off last years playoff appearances. Minnesota started the year 5-0, while Arizona was 1/3 a month into the season.Since their undefeated start, the Vikings have lost four games in a row. The Cardinals (4-4-1) have used two wins against the San Francisco 49ers to jumpstart the second half of the season.Despite the differing paths, there is still a road to playoff contention as they meet Sunday in Minnesota.Weve been fortunate with some of the other things that have happened in the league that were still in a good place, Vikings coach Mike Zimmer said. We can go out and win. I know everybody thinks Im crazy, but my goal is to win the division. So, go out and get some wins and get going again. Thats all.The last two ball games have been (close and), honestly, could go either way. We didnt win them, so we just need to get a couple of these either-way games and win. Thats kind of what happened at the beginning of the season. So, its a seven-game season now.Minnesota is tied for the NFC North lead with the Detroit Lions at 5-4. Arizona is two games behind Seattle in the NFC West but still in prime wild-card position.Both teams have dealt with plenty of injuries, which will also impact Sundays game.The Vikings lost left tackle Jake Long for the rest of the season when he injured his Achilles in last weeks 26-20 loss at Washington. Long, signed as a street free agent in October, had already been an injury replacement at left tackle after starter Matt Kalil was lost after two games.Zimmer hasnt revealed his plans for his battered offensive line on Sunday. Jeremiah Sirles could join the starting lineup. Minnesota, which has also lost right tackle Andre Smith for the season, has T.J. Clemmings at the other tackle.Weve definitely been a little bit unfortunate as far as some of the injuries that weve had up front, quarterback Sam Bradford said. But like weve done in the past, we just have to keep moving forward. Obviously, Sirles and T.J., they started a couple of games together so we feel confident in them because theyve been out there, theyve done it before. Theyve played a lot of football. As bad as this is to continue to lose guys youve just got to try to stay positive and just keep moving forward.Arizonas injuries have hit hardest in thhe secondary.ddddddddddddSafety Deone Bucannon missed Wednesdays practice with an ankle injury. Defensive back Tyrann Mathieu was limited in Wednesdays practice with a shoulder injury. Mathieu missed last weeks game with the injury. Both are questionable for the game.My shoulder feels fine, its stable for the moment, Mathieu told the Arizona Republic. Ill continue to put it to work during practice and see where Im at, at the end of the week.Cardinals coach Bruce Arians and Zimmer know each other well dating back to their time as coordinators in the AFC North. Arians was the Pittsburgh Steelers offensive coordinator facing Zimmers defenses for the Cincinnati Bengals.Ive always respected Zim as one of the most sound, aggressive defensive coaches that Ive ever gone against ... They dont beat themselves, Arians said via conference call. I think our defense, our defensive line is playing at a very high level right now. I think both offensive lines have their work cut out for them.Arizona owns the leagues second-ranked defense in terms of yardage, one spot ahead of Zimmers Minnesota crew. The Cardinals are allowing 295.2 yards per game compared to the Vikings 308.8 yards per game. But Minnesota is giving a league-low 16.9 points per game. Arizona is tied for third, giving up 17.8 points per game.I think this is going to be one of our biggest challenges of the year, Bradford said. Probably the best group that weve faced. So, I think its important that we have a great week of practice and get ourselves ready to go.Both teams also made significant special teams changes this week. The Cardinals brought back punter Drew Butler after Ryan Quigley didnt prove to be an upgrade the past six games. Quigley had the leagues lowest qualifying gross punting average at 41.6 yards per punt.Minnesota parted with embattled kicker Blair Walsh and signed Kai Forbath. Walsh had only made 75 percent of his field-goal attempts and hit just 78.9 percent of his extra-point attempts.It was just something we felt like we needed to do, kind of move forward, Zimmer said. Were all accountable for the things we have to get done, and I think we gave him a lot of opportunities. Although, Blairs a great kid, and it was hard to do. Its just part of the business.Business this week, for both teams, will be trying to stay in the playoff race. ' ' '