eks ago. The return of both could help keep Luck stay upright, too. Hes been sacked a league-high 33 times this season.PROTECTING MARIOTA: Defenses have sacked M

RIO DE JANEIRO -- At these Olympics, its not always the grass thats greener on the other side.Its the diving pool.Think Rio officials were embarrassed they had to hire helicopters and spotters to try and keep sewage out of sailing waters? Now they cant seem to get the green out of the diving pool water.That led to some unusual television Friday as underwater cameras tried to focus on amoebae-like shapes that seemed more sea creature than human diver. In the stands, fans cheered when their favorite diver would suddenly emerge from what looked like green slop.It looked bad, though Rio officials insisted it was not really all that bad. Neither, they said, was the chlorine used in the adjacent water polo pool to make it a lighter shade of green for Fridays play.Still, this isnt exactly what they had in mind when promising the Olympics would go green.It doesnt take a genius to know what they did to the pool, U.S. water polo captain Tony Azevedo said. But it doesnt matter. Play in green water, play in chlorinated water, I mean Im an American. All our water is over-chlorinated, so it doesnt really matter.Friday marked three days since the once blue water began turning green, and two days since Olympic officials insisted it was getting better. So much better that the pool was closed for practice Friday as they frantically tried to clean things up before the womens 3-meter springboard preliminary.It didnt work, although the pool did smell somewhat better than it did in the morning when two German divers posted a picture on Facebook showing themselves covering their noses after practice was cancelled.Olympic officials werent exactly forthcoming on what made the water turn green, though those who clean swimming pools quickly identified it as algae. The officials also werent terribly clear on how algae was somehow allowed to grow in a pool being used for the biggest sporting event in the world.We first learned that chemistry is not an exact science, said Rio 2016 spokesman Mario Andrada.That might come as somewhat of a surprise to actual scientists, who say keeping a swimming pool clean and blue isnt that difficult if certain procedures are followed.To them, its easy not being green.There is some imprecision in maintaining chemistry in a large body of water, said Tom Lachocki, executive director of the National Swimming Pool Foundation in Colorado Springs, Colo. However, maintaining disinfectant in water has been the largest public health advance in the last century. The basic principles of maintaining disinfectant, proper pH, and circulation and filtration are scientifically sound and well established.Lachocki, a chemist himself, said making the pool blue again involves a combination of algaecide, chlorine and the proper pH levels.You get algaecide and proper chlorine and youll see that pool clearing up overnight, he said. Within 12-14 hours youll get cleaner water.Rio organizers can only hope that is true. Theyve battled water issues since being awarded the Olympics seven years ago with the promise they would clean up Guanabara Bay, the sailing venue that remains the collection area for much of the citys untreated waste.Theyve already had to deal with a Belgian woman who won a 2012 bronze medal falling ill after sailing the polluted waters of Guanabara Bay. The last thing they need is for pictures of divers doing flips and twists into green water to be iconic images of these games.We certainly could have done better in the beginning to prevent the water from turning green, Andrada admitted. Once it turned green, we again made another bit of a mistake.Its a mistake that made more than a few divers wary, including Britains Tom Daley, who tweeted after finding the pool closed for practice Friday that Hopefully that means we havent been diving in anything too bad the last couple of days!Hopefully not, because the worst case scenario is always that the water is as nasty as it looks.And no one wants to see divers turn green with anything other than envy.----Tim Dahlberg is a national sports columnist for The Associated Press. Write to him at tdahlberg(at)ap.org or http://twitter.com/timdahlberg Custom Calgary Flames Jerseys .4 million title. 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INDIANAPOLIS -- For five years, the Indianapolis Colts have beaten up Tennessee in every conceivable way.They won on their home turf and on the road. They won with Andrew Luck at quarterback, with former Titans starter Matt Hasselbeck behind center, even with backup Dan Orlovsky. They won in overtime, in blowouts, with fourth-quarter comebacks and a 2-point conversion stop.Perhaps that mind-boggling 10-game losing streak will finally end Sunday in Indy.Since I have been here I dont think we have beaten the Colts, so I am pushing that and telling everybody that that has to be our main objective, is to beat the Colts. Titans tight end Delanie Walker said. If we want to be the leaders in this division, this is one team that we have to beat.Actually, the skid predates Walkers arrival in 2013.The last Titans win in the series came Oct. 30, 2011. Six weeks later, the 0-14 Colts won 27-13 -- a loss that prevented the Titans from making the playoffs.This time, the Titans (5-5) are on one of their hottest streaks in years.DeMarco Murray has regained his league rushing champion form, second-year quarterback Marcus Mariota is playing the best football of his career, Walker is playing like a Pro Bowler, and the offense has already set a franchise record by scoring 35 or more points in three straight games.The defense held Aaron Rodgers in check last week, and coach Mike Mularkey opened up the playbook with an onside kick to being last weeks game, and Murrays halfback pass for a touchdown.Even the Colts can see Tennessee brimming with confidence.Indy (4-5), meanwhile, is trying to build momentum for a playoff push by winning back-to-back games for the first time all season.And despite having so much success against the Titans over all these years, the Colts know history alone wont help them this weekend.We have to be more consistent. One week we didnt tackle well. The next week we tackled well, but we didnt cover well. The next week ... you know? Indy safety Mike Adams said. Its too much of a roller-coaster ride, now we have to figure this thing out. Its time to peak because, as you guys already know, last week playoff football started.It did?Here are some things to watch Sunday:CHAMPION COLTS: Peyton Manning, Reggie Wayne, Jeff Saturday and about three dozen more players from the 2006 Super Bowl champions will be in Indy for their 10-year reunion.dddddddddddd Two players who likely wont participate in the halftime ceremony: kicker Adam Vinatieri and outside linebacker Robert Mathis, the only players from that team still on Indys roster.Luck called it a cool event but acknowledged its not something those in the locker room are talking about. Theyre more focused on winning this game in front of the former Colts.CLICKING OFFENSE: The Titans are rolling. In addition to the three 35-plus point games, they have scored at least 26 points in each of their last six, and their 33 touchdowns are tied for second in the league (San Diego). The streak has been spurred by Murray, the NFLs second-leading rusher, who has four 100-yard games in the last six. He ran for 107 yards in the first meeting with Indy last month. Mariota has thrown an NFL-high 17 TDs with only three interceptions in those six games, and his passer rating (119) over that span is No. 2 in the NFL.HEALTH CHECK: Indys bye came at the perfect time and now the Colts could reap the benefits. If the practice reports are correct, the Colts offense could have its original starting lineup for the first time since Week 2. Left guard Jack Mewhort (triceps) and right tackle Joe Reitz (concussion) both returned to practice after missing the Green Bay game two weeks ago. The return of both could help keep Luck stay upright, too. Hes been sacked a league-high 33 times this season.PROTECTING MARIOTA: Defenses have sacked Mariota just twice in the past three games -- both coming last week after left tackle Taylor Lewan was ejected for contact with an official. The Titans have allowed only 14 sacks all season and are sixth in the league, yielding a sack on 4.4 percent of pass attempts. Mularkey said he hopes watching the game from the locker room taught Lewan a lesson, and Mularkey wants his left tackle to make sure hes safely back in the huddle to avoid any issues.Im hoping that when he watched, he saw that we can play without him and be effective, Mularkey said.---For more NFL coverage: http://www.pro32.ap.org and http://www.twitter.com/AP-NFL ' ' '