HOUSTON -- The Houston Texans proved they were serious about upgrading their offense this offseason by luring Brock Osweiler from Denver with a four-year, $72 million contract. Now its time to see if the quarterback was worth it.All eyes will be on Osweiler when the Texans begin training camp on July 31 -- especially with star defensive end J.J. Watt sidelined by a back injury.Im impressed with Brock, probably most of all in his ability to learn our system, our operation, coach Bill OBrien said. Its not easy to come in here and learn how we operate as an offense, how we meet, how we call plays at the line of scrimmage, how we teach defense ... were really happy with his progress.On Thursday night, a person familiar with Watts condition said the star defender has had back surgery and will begin training camp on the physically unable to perform list. The person spoke to The Associated Press on on condition of anonymity because the team hasnt confirmed the surgery or Watts roster status.Watt, the NFL sacks leader last season with 17 1/2, will miss the start of training camp, but is expected to be ready for the season opener. Watt spent most of the offseason recovering after having surgery to repair a groin injury in January.Watts still looking to do more in 2016 and said he never watches his highlights, instead viewing his bad plays to figure out how to get better.Theres so many great players in this league, and you want to learn and grow as much as you can and gain as much information as you can so that you can improve your own game, Watt said.Osweiler has started just seven games in his four-year NFL career and they were all last season. He was presumed to be Denvers starter this season after Peyton Mannings retirement, but he signed with Houston for megabucks instead.He joins an offense highlighted by star receiver DeAndre Hopkins, who finished third in the NFL with 1,521 yards receiving last season, and that added running back Lamar Miller in free agency, then got receivers Will Fuller and Braxton Miller in the draft.The Texans overcame quarterback woes last season to finish 9-7 and reach the playoffs for the first time since 2012. They were ousted in the wild-card round by Kansas City after Brian Hoyer committed five turnovers in the 30-0 loss.Now Osweiler takes over and he feels good about his grasp of Houstons offense after the work he got in practices and minicamp this spring and early this summer. Hes looking to take his understanding to another level in camp.Its just focusing on the details of our offense, he said. Theres a lot of things that go into it -- formations, motions, shifts, different cadences, different route concepts, run checks, pass checks -- and so its just focusing on the details and focusing on the line-of-scrimmage operation.Some things to know about the Texans, who open the season Sept. 11 against the Chicago Bears:EXPECTATIONS FOR CLOWNEY: Outside linebacker Jadeveon Clowney is entering his third NFL season and so far the No. 1 overall pick in the 2014 draft has failed to live up to expectations during two injury-plagued seasons. Clowney played just four games as a rookie before having season-ending microfracture surgery. He recovered from that for the start of last season, but missed three games and Houstons playoff match with various ailments. He did show flashes of the potential he displayed in college, though, and finished with 4 1/2 sacks and forced a fumble.Its frustrating. It feels like youre letting the team down when youre not out there, Clowney said. Injuries happen, youve just got to be mentally tough to come back and show the guys you are ready to play.MILLERS POTENTIAL: The Texans snagged an intriguing player when they drafted Braxton Miller in the third round. Miller was the two-time Big Ten offensive player of the year in 2012 and 2013 after throwing from more than 2,000 yards and rushing for more than 1,000 in both of those seasons. He sat out for a season with a shoulder injury before moving to receiver last year, when he finished with 26 receptions for 341 yards.Miller is happy with his progress since making the move.NEW CENTER: The Texans will likely have rookie second-round pick Nick Martin at center after Ben Jones, who started every game the last two seasons, signed with Titans. He is the younger brother of Zack Martin, a first-round pick by the Cowboys in 2014 and a two-time Pro-Bowler at guard.---AP NFL website: www.pro32.ap.org and www.twitter.com/AP-NFLCheap Nike Sb Dunk . 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Datsyuk will miss Tuesdays game against New Jersey and could be sidelined longer, while Cleary will likely miss at least the next three games. Its been an injury-plagued season for Datsyuk, who has suited up for just 39 games.LONDON -- Its been a lively start to the season finale at the O2 Arena, with Novak Djokovic almost tagging Boris Becker and Andy Murray making his debut as world No. 1.The top two players in the world are edging closer to a straight battle for the year-end No. 1 spot, though there are plenty of other storylines developing at the Tour Finals.Here are five things to watch out for Tuesday:?1. Has Djokovic cooled off?Novak got a little wound up by one British journalist in his news conference after being Dominic Thiem.He didnt react too well when it was suggested he may have been close to hitting a fan when he struck a ball in frustration towards his players box after losing a first-set tiebreaker.Venting his anger on-court may have worked -- he lost just two more games on his way to victory -- but his post-match outburst added fuel to the feeling Djokovic is still not quite himself.It has been a rocky six months for the Serb since winning the French Open, culminating in him losing the No. 1 ranking to Andy Murray.He will need to show he can deal with the pressure of battling back from adversity, something he has rarely had to do the past several years.2. Can Raonic snap his winless streak vs. Novak?It is seven matches and seven defeats against the current world No. 2 for Milos Raonic, who got off the mark with a 6-3, 6-4 win over Gael Monfils Sunday evening.The Canadian admitted it would be quite the step up.He was very commanding towards the end of his match [against Thiem], Raonic said of Djokovic. He really stepped up after a difficult, slow start.Its going to be a difficult task that I have ahead of me. I feel like Im doing some things well. I feel like I can do some things better.I was quite proficient on returning [against Monfils]. I took care of my serve like I hoped to. Thats what my game depends on. I hope I can keep moving forward.3. Will the real Monfils stand up?After all these years hes finally here. Its been a long time waiting for one of the most highly touted players of this era, and the 30-year-old Gael Monfils Tour Finals debut was one to forget.I simply love it, the Frenchman said, of his first experience playing at the O2 Arena, in a straight-sets defeat to Milos Raonic.But hopefully Monfils wants to prove he is here in London to do more than just make up the numbers.Well give him the benefit of the doubt against Raonic. I came heree with not even a week of practice.dddddddddddd, he said. Even when youre 100 percent, its tough to beat those guys. Hes No. 4 in the world.Next up is Thiem. Its going to be a tough one, Monfils said. Not much time for me to recover. To be honest, a bit sore. I can feel it straightaway, so its not a good sign. Its a while I didnt play with pressure, I guess, in a tournament, with competition.Dominic is a fantastic player. He play from the baseline. Maybe give me a bit more time than Milos.4. Time for Thiem to turn it onDominic Thiem is 23. He has won titles on all four surfaces. But he wilted spectacularly under scoreboard pressure, after going a set up against Novak Djokovic.There are so many things to improve, the Austrian said after his opening defeat, I think there were too many unforced errors in the first few shots, in the rallies. Yeah, other things were good, other things were bad.For the man touted as one of the next big stars of the mens game, Thiem has had a number of early losses since reaching the French Open semifinals -- he has failed to make it past the second round at Wimbledon, Kitzbuhel, Toronto, Beijing, Vienna and Paris.He will need to find another gear against Monfils if he doesnt want another early departure in London.5. Can Jamie Murray cap off a stellar year?All the talk has centred on Andy Murrays bid to finish the year on top of the rankings, but his brother Jamie is also in with a shout of finishing as doubles No. 1.He and Bruno Soares will be looking to cap off a memorable 2016 with the doubles crown here, after winning the Australian Open and US Open.Tuesdays afternoon session throws up an intriguing battle against the Bryan brothers, with both teams having won their opening matches.Its always exciting to play against them, said Murray. Theyre clearly the best team in history with the amount of titles they won. They always bring a great energy to the court. We all look up to them. We all aspire to kind of get to their level.Of course, probably theyre starting to kind of decline a little bit. But thats always going to happen when youve won so much, and time has taken on.Were really fired up to play against them. Should be a great match. Well, Im looking forward to it. I hope Bruno is, as well. 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