BUDAPEST, Hungary -- No one has been able to stop Lewis Hamilton and Nico Rosberg so far this season -- except themselves.The slow, twisting track of the Hungarian Grand Prix could prove challenging Sunday for the Mercedes teammates who have collided twice already this year.After 10 races, Rosberg has five victories and leads the F1 championship with 168 points, but he has seen his lead over Hamilton, who has four wins, cut from 43 points to just one.The seasons turning point came in May at the Spanish Grand Prix in Barcelona. Rosberg had won the first four races but the two Mercedes collided a few turns after the start and Red Bulls Max Verstappen took the checkered flag.Since that fiasco, three-time world champion Hamilton has won four of five races, while Rosberg, championship runner-up in 2014 and 2015, has won just once. Halfway through the longest-ever Formula One season of 21 races, Mercedes has won nine of 10.The battle is on with Lewis and Im feeling great in myself and great in the car, so bring it on, Rosberg said ahead of the 31st Hungarian GP. I cant wait for the next battle between us in Budapest. Its a tough circuit that really tests you as a driver.The Hungaroring has not been kind to Mercedes lately. Last year, Hamilton finished sixth here and Rosberg eighth -- the only 2015 event in which neither driver had a podium finish when completing the race -- while Hamilton was third in 2014 and Rosberg fourth.Nonetheless, Hamilton has won four times in Hungary during his 10-year career.Its a track that for some reason has always suited my style, Hamilton said. The past couple of years I havent had the smoothest weekends in Budapest, but I know Ive got the pace so Im gunning to turn that around this time.Besides the crash in Spain, Hamilton and Rosberg also collided in the last lap of the Austrian Grand Prix, as Hamilton attempted to pass Rosberg for the lead. Hamilton won the race but the German driver lost his front wing and had to settle for fourth.Rosbergs troubles continued at the last race, the British Grand Prix at Silverstone. Hamilton won again and Rosberg fell from second to third after being penalized 10 seconds for receiving illegal assistance over the team radio.Ferraris Kimi Raikkonen is third in the standings but 62 points behind Rosberg. Red Bulls Daniel Ricciardo has 100 points, two ahead of Raikkonens teammate Sebastian Vettel. Verstappen is sixth with 90 points and no one else has more than 54.Mercedes isnt relaxing.The Hungaroring plays to the strength of our rivals, said Mercedes chief Toto Wolff. 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The NFL says its all about player safety.Try telling that to Cam Newton, one of the leagues biggest stars.The way the Carolina Panthers quarterback was beaten up in a season-opening loss at Denver, one would think it is back to open season on anyone wearing a helmet and shoulder pads.If nothing else, it showed that Newton is subject to a different set of rules than the leagues other QBs.Can you imagine Tom Brady or Drew Brees taking four helmet-to-helmet hits -- including two where the defender appeared to leave his feet and launch himself into Newton -- with only a single flag being dropped?We cant either.Clearly, the NFLs epiphany on player health -- which the jaded will note only came at the prodding of a massive lawsuit brought by former players whose lives were ruined by repeated hits to the head -- still hasnt gone far enough.Weve got to treat Cam like a quarterback, Panthers tight end Greg Olsen said after Thursday nights Super Bowl rematch, won by the Broncos 21-20. I know hes the biggest guy on the field, but hes still a quarterback.Its only natural that the officials see Newton, as imposing a quarterback as there is at 6-foot-5 and 245 pounds, in a different light than his mostly smaller counterparts.And, to be sure, Newtons running ability puts him in harms way a lot more often than a pure drop-back passer.The guy is a ... tight end, defensive end playing quarterback. What are we supposed to do? said Broncos linebacker Brandon Marshall, who doled out a couple of egregious hits on Newton. When hes running the ball -- theyve got quarterback-designed runs, quarterback keeps, quarterback powers, draws, everything -- were going to treat him like a running back.Thats no reason for the officials to continually look the other way.In the short term, the league needs to immediately send out an edict to its officials that ALL quarterbacks are deserving of the same protections, as well as launch an urgent review of its concussion protocol after Newton went through the entire game without being tested, even after all those brutal hits.Never mind that the Panthers said he was tested four times afterward and all were negative.The next player might not be so lucky.Longer term, the league needs to seriously consider following the college game, which has brought down the hammer on targeting. When a player initiates a hit with the top of the helmet, leaves his feet to deliver a blow or levels a defenseless player, he is ejected from the game and has to sit out the first half of the next game as well. In addition, hiss team receives a 15-yard penalty.ddddddddddddAll targeting calls are automatically subject to a video review, a necessary step in a violent game thats nearly impossible to keep a handle on in real time. While the targeting rule still has its share of hiccups, the replay system helps to weed out the calls that are blatantly wrong, an important safeguard when a foul comes with such stiff penalties.At the very least, the NFL needs to expand its replay system to help officials determine which hits are truly dangerous.I think as far as big hits on quarterbacks or hits to the helmet, I think that would be important and I think eventually it is going to come that, Carolina coach Ron Rivera said Friday. If there is a questionable call, you have to go to replay just to make sure. Again, this is about player safety at the end of the day, so we have to find a better solution to keep these things down to a minimum.The NFL already determined that Marshall shouldve been penalized for his second hit to Newtons head after the quarterback had thrown a pass, according to a person speaking to The Associated Press on condition of anonymity because the league doesnt comment publicly on the details of such reviews.That could lead to a hefty fine.Big deal.The league needs to show its at least as concerned about player safety as it is about deflated footballs.Immediately after the game, Newton shrugged off the beatdown he received, saying it wasnt his job to question the officials. Maybe he was still groggy. Maybe hes gotten so used to being subjected to a different standard that he expects it.I try and warn the refs every time I do get hit in the head, he said. But if the flag is not thrown, then its OK.No, its not.The league should be watching out for all its players, even those who seem big enough and strong enough to take care of themselves.Its kind of been like that since hes been here, Carolina linebacker Thomas Davis said. They judge him different. They look at him different.Thats got to change.Week 2 would be a good time to start.---Paul Newberry is a national writer for The Associated Press. Write to him at pnewberry(at)ap.org or at www.twitter.com/pnewberry1963 . His work can be found at http://bigstory.ap.org/content/paul-newberry .---AP Sports Writers Steve Reed in Charlotte and Arnie Stapleton in Denver contributed to this report.---AP NFL website: www.pro32.ap.org and www.twitter.com/AP-NFL ' ' '