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 Wimbledon 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.MIXING 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/HowardFendrichCesc Fabregas Chelsea Jersey . -- Josh Sterk scored once and set up two more as the Oshawa Generals edged the visiting Belleville Bulls 3-2 on Friday in Ontario Hockey League action. Mateo Kovacic Jersey . Each of Houstons starters scored in double figures as the Rockets improved to 2-0 against the Spurs this season, with both victories coming on the road. They also moved within 3 1/2 games of San Antonio (22-7) for the lead the Southwest Division. http://www.chelseafcproshop.com/Kids-Andreas-Christensen-Jersey/ . Pedro scored from a pass by Lionel Messi in the 33rd minute and added two more goals in the 47th and 72nd after Valdes saved his second penalty in four days following his stop in Wednesdays 4-0 over Ajax in the Champions League. Cesar Azpilicueta Chelsea Jersey . Pettersen, winner of last years Evian Championships, had nine birdies and three bogeys, holding off a series of challengers led by Marion Ricordeau of France. The second-ranked Norwegian made her season debut after missing the LPGA Tours opening event last month in the Bahamas because of a shoulder injury. Willy Caballero Jersey . Goals from Jerome Boateng, Franck Ribery and Thomas Mueller extended Bayerns unbeaten run to a record 37 matches. "This record is incredible," Bayern coach Pep Guardiola said.Charlie Nicholas will attempt to end Matt Le Tissiers unbeaten run in Sky Sports Fantasy Six-a-Side on Super Sunday.Le Tiss racked up his fourth successive victory midweek as his selected VI for Liverpool v Everton thumped Paul Mersons in their winner-stays-on challenge.The Soccer Saturday pundits with the most wins come the final weekend of the season will battle it out to land £1,000 for their charity of choice.Charlie should hold an advantage with this weekends game being between his former club Arsenal and Sunderland, live on Sky Sports 1HD at 2.05pm, while the the usual £10,000 is up for grabs is up for grabs for entrants of the free-to-play game. Fantasy Six-a-Side Pick your team here for the chance to win the £10,000 jackpot. With no player values, formations or position requirements in Sky Sports Fantasy Six-a-Side, the pundits can pick whoever they want except for only one of the four Elite Players, who are Fabio Borini, Jermain Defoe, Mesut Ozil and Alexis Sanchez.Heres who the Soccer Saturday pundits are selecting...Matt Le Tissiers teamAlexis Sanchez - Ive got to go with the form man. Its not quite been the sensational second season Arsenal fans were hoping for but hes got five goals in his last four games. Alexis Sanchez bagged a brace against West Brom midweek Danny Welbeck - He sat out the midweek win against West Brom so Im hoping that means hell be fresh to play the full 90 on Sunday and get back to scoring ways.Alex Iwobi - Arsenal may not have much left to play for but this lad has plenty of incentive to continue to impress, which hes certainly done so far with a couple of goals and assists since being handed his chance.Wahbi Khazri - He seems to start every game for Sunderland and racked up plenty of goals at Bordeaux. Hopefully he can do the same for my side. Fantasy Six-A-Side points scoring breakdown Theo Walcott - After pulling clear of United with their midweek win, I think Arsene Wenger might give Walcott a chance to prove himself with a rare start.ddddddddddddYann MVila - He doesnt score many, netting just once this season, but what you will get from him is plenty of passes and hell win the majority of duels with Arsenals midfield.Charlies teamMesut Ozil - Well, Ill let Le Tiss have the in-form Sanchez and go with the player who has been Arsenals best player over the course of the season season. Mesut Ozil has scored six and assisted 18 goals this season Mohamed Elneny - He ranks first at the club for passing accuracy and second for average number of passes per game, so is guaranteed to pick up a healthy total.Jan Kirchhoff - Hes my insurance pick for in case it all goes wrong on Sunday and Arsenal fail to find the net.Hector Bellerin - His pace allows his to get forward so Id back him to create a few chances and complete plenty of passes, while Ill obviously be hoping Arsenal can record back-to-back clean sheets. Patrick van Aanholt - Another insurance pick but one that gets forward a lot, with three goals making him their joint fourth top goalscorer.Laurent Koscielny - He should be one of the best defenders in the Premier League and is another goalscoring defender, with four to his name this season. Fantasy Six-a-Side Who makes your VI? Pick your team to win £10,000 here.Also See:Paul Clements dream teamLISTEN: The Fantasy FC podcastOn Soccer SaturdayOn The Fantasy FC ' ' '