RIO DE JANEIRO -- Australias two gold medals on the opening night of swimming competition each had a slightly different gleam.Distance freestyler and Olympic rookie Mack Horton won the 400-meter freestyle Saturday and said he was propelled by self-belief. Later in the evening, the favored womens 400 freestyle relay, led by star sisters Cate and Bronte Campbell, defended the event title and set a world record of 3 minutes, 30.65 seconds.Cate Campbell said the repeat -- even though it came by a greater margin than four years ago -- was harder because of the expectations the quartet carried.But, she added, I think Mack was the real hero.It was more than a kind pat on the back from a more experienced teammate. Horton reeled in early leader James Guy of Great Britain and held off 2012 champion Sun Yang of China in the stretch, but it was his blunt talk about doping before and after the race that set him apart.I guess I wouldnt really feel right if I raced at this stage against someone who has tested positive and didnt bring it up, Horton said of Yang, who served a controversial three-month suspension in 2014 due to a positive test for the stimulant trimetazidine. News of the sanction surfaced months after Yang, a double gold medalist in the 400- and 1,500-meter events in London, served the ban.After Saturday afternoons preliminary heats, Horton said he ignored Yangs attempt to provoke him by splashing him in a training session earlier in the week. I dont have time or respect for drug cheats, Horton said.While straight-up personal tension certainly fueled Hortons remarks, they also tap into more general and long-standing suspicion of doping in Chinas swimming program. Most recently, the World Anti-Doping Agency and FINA, swimmings world governing body, said earlier this year that whistleblowers claims of positive test cover-ups first revealed in The Times of London were being investigated.Beyond that, the overall disarray in international anti-doping jurisprudence -- laid bare by the dysfunctional process that cleared the way for so many Russian athletes (including swimmers) to compete in Rio despite compelling evidence of pervasive state-sponsored doping -- has prompted an increasing number of athletes to question a system that is supposed to protect them.Often the most corrosive aspects of doping is the internal toll it can take on the psyche of the athlete in the next lane who wonders if his opponent has an insurmountable advantage. Horton said he doesnt lack for confidence, but part of his decision to go public was directed back at himself, saying aloud what he needed to execute in the water.That last 25, that last 15, I felt I had concrete blocks on my arms, basically, but then I kind of flashed back to my statement this morning, Horton said. I dont really have a choice to let him beat me. I kind of have to beat him now. So thats what I did.Horton said he thought about the message he wanted to convey, and if a reporter hadnt brought it up, I probably would have slipped it in there somewhere. He said he hopes other athletes speak their minds on the topic.It will add even more electricity to an already charged atmosphere if they do. Jonas Valanciunas Jersey . Already owning gold from competition in Vancouver in 2010, Loch posted a combined four-run time of 3:27.526. That included a track-record third run of 51. Stitched Grizzlies Jerseys . 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Message to all those other NFL defenses: Cover Julio Jones.The Falcons receiver caught 12 passes for 300 yards -- becoming the sixth player in NFL history to hit the 300-yard mark in receiving to lift Atlanta to a 48-33 victory over Carolina on Sunday.Matt Ryan had 503 yards passing for Atlanta and the quarterback and receiver became the first teammates to reach 500 and 300 in the same game .We tried to cover him, said Panthers coach Ron Rivera. We thought we had a good plan coming in.That plan involved sticking rookie cornerback James Bradberry, among others, in single coverage on Jones for most of the game. Ryan and Jones saw it quickly, and capitalized all day.Jones said he was surprised at the strategy, especially because the Panthers play the Falcons twice every year as members of the NFC South. Jones had 1,871 yards receiving last year -- the second-biggest season total in league history.They put the young corner on me man to man ... and Matt made some great decisions today, Jones said.In case you missed it, here are other notable topics after the NFL seasons fourth Sunday:PAGING MR. BRADY: For the first three weeks, the Patriots could do no wrong, even without Tom Brady, and then without his backup Jimmy Garoppolo. It all came crashing down against the Bills. Led by its third-string quarterback, rookie Jacoby Brissett, New England suffered its first home shutout since 1993 -- a 16-0 loss. Nothing was good enough, Patriots coach Bill Belichick said. At any position, at any phase of the game. It just wasnt good enough. Maybe next week, it will get better. Bradys four-game Deflategate suspension ended at midnight, and hell be eligible when the Patriots travel to Cleveland.PAGING MR. LYNCH: On a day when the importance of the backup quarterback came into sharp focus, the Broncos found out they may have a good one. First-round draft pick Paxton Lynch entered Denvers game against Tampa Bay after starter Trevor Siemian got slammed to the turf and endured an injury to his left shoulder late in the first half. Lynch went 14 for 24 for 170 yards and his first career touchdown pass to help the Broncos pull away for a 27-7 victory.ddddddddddddI remember him coming in the huddle and telling me, `I got to go at it, I want to throw a touchdown pass, said receiver Emmanuel Sanders, who caught the TD. Thats the first of many.CONCUSSIONS: Quarterbacks Cam Newton and Carson Palmer each left their games in the fourth quarter with concussions. Newton, who endured multiple hits to the head in the season-opener against Denver but remained in that game, got hit by Falcons linebacker Deion Jones and exited. Palmers head hit the turf on a sack by Aaron Donald of the Rams. The Cardinals lost 17-13.GOING THE DISTANCE: The Jacksonville Jaguars headed across the Atlantic Ocean to get their first victory of the season. Playing in London -- their home away from home -- the Jaguars got out to a 17-6 lead and held on for a 30-27 victory over the Colts, whose three fourth-quarter touchdowns werent enough. The Colts were a popular pick to make the Super Bowl this season. Instead, theyre 1/3 and have given up the second-most points (125) in the league at the quarter mark. (Were) tired of almosts, said Colts quarterback Andrew Luck. We want to win. Its a winning culture and the Colts expect wins, and it doesnt just happen when you trot out onto the field.OH, THE FINAL SCORE: For those of you who turned off the Sunday night game -- and who could blame you? -- the final score: Pittsburgh 43, Kansas City 14. The Steelers were ahead 22-0 after a quarter and things never got closer. Fantasy watch: Ben Roethlisberger had an even 300 yards and five TDs; LeVeon Bell had 178 yards total offense but didnt score. Those who bailed did miss some entertaining Al Michaels reminisces about Vin Scully, Keith Jackson and Dick Enberg -- among others -- along with the pronouncement that Michaels does best: If you ever had a doubt, you know now, it is over, he said when the Steelers made it 43-7 in the fourth quarter to surpass the over-under total in Vegas of 48. ' ' '