Rafael Nadal has been knocked out of the Miami Open, after being forced to retire from his second round match against little-known Bosnian Damir Dzumhur. After slipping 3-0 behind in the deciding set, Nadal required medical treatment before deciding to call it a day after 109 minutes on court.The Spaniard said he started feeling dizzy towards the end of the first set and later withdrew claiming he was too scared to continue. However, the No 5 seed appeared to be cruising during the early stages of the contest as he raced through the opening set, which he took 6-2 in just 44 minutes.Dzumhur, who was broken twice during the set, did not help his own cause by sending down five double faults while the 29-year-old from Mallorca conceded just five points from his four service games.But everything was to change dramatically after that, with Nadal losing his serve twice during the second set which his 23-year-old opponent claimed 6-4 in temperatures close to 90 degrees.And after Nadal had suffered two more breaks early in the decider, and slipped 15-30 down in game four, the 14-time Grand Slam champion disconsolately shook hands with the delighted Dzumhur. Nadal walks off court after retiring against Damir Dzumhur It had been 443 matches and six years since Nadal last retired on the ATP Tour, when he was beaten in the quarter-finals of the Australian Open by Andy Murray.Nadal admitted: Everything was fine until the end of the first set and I started to feel not very good. It was getting worse and worse and worse.I get a little bit scared to be too dizzy and to lose fluids. I called the doctor a couple of times. I decided I was not safe. I wanted to finish the match but I decided I would not.Hopefully its nothing. Hopefully its just the extreme conditions out there, the beginning of a virus combined with the conditions.Nadal, a four-time Miami finalist but never a champion, lost 22 of the last 29 points on the Stadium Court.Watch the Miami Open live on Sky Sports 3 - your home of tennis.By purchasing a Sky Sports Day Pass for £6.99 or Sky Sports Week Pass for £10.99, you can enjoy access to all seven Sky Sports channels and watch on a TV with a NOW TV Box or on a range of devices. Also See: Watson battles on in Miami Djokovic beats Britains Edmund Nya Vapormax . Minutes after the previously winless Colts got their first win, 27-13 over Tennessee, team vice chairman Bill Polian said the four-time league MVP will not play this season though he has begun throwing to teammates at the team complex. Air Max Tn Dam . Wearing bib No. 1, Maze skied through the gates cleanly to defend her big first-run lead and finish 0.07 seconds ahead of Anna Fenninger of Austria. Defending champion Viktoria Rebensburg of Germany was third, trailing 0. http://www.airvapormaxsverige.com/. -- Justin Verlander took a no-hit bid into the sixth inning and won his fourth straight decision, leading Detroit over the Kansas City Royals 9-4 Sunday and extending the Tigers winning streak to a season-high five games. Nike Air Max Plus Tn Dam . For the Athletics, hes extremely important at the top of the order, especially with Coco Crisp hurting. Jaso drove in three runs Sunday night, helping Scott Kazmir and Oakland beat the Texas Rangers 9-3. Nike Air Max Plus Rea .J. -- Travis Zajac of the New Jersey Devils took a lot of grief considering his scored the first of his career-best three goals just 12 seconds into a crucial game against the Florida Panthers.BEREA, Ohio - Following his first practice in nearly a month because of a concussion, Browns tight end Jordan Cameron turned and tapped his hand lovingly on the photo taped inside his locker.Its one of his smiling 5-year-old son, Tristan, the joy of Camerons life.Ive got this little guy, Cameron said. I wouldnt come back if I felt like I was in danger of not being there for him.Cameron returned to practice Friday for the first time since Oct. 24, two days before he sustained his third concussion in less than two years on a vicious hit against Oakland. The 26-year-old has spent the past few weeks waiting for symptoms to subside, but Friday was the first time he was able to get on the field to run pass routes, make catches and feel like an NFL player again.When youre not with your teammates for a month it feels good to be back, he said.Cameron, though, will not play this week when the Browns (4-6) visit the Atlanta Falcons. Cameron has continued to experience little mini headaches which have kept him from being fully cleared until Friday. Hes followed the NFLs strict protocol on head injuries since he was struck in the back of the head by Raiders safety Brandian Ross, who was fined $22,050 by the league for his hit.Cameron feels he has finally turned the corner. He has visited two specialists, who have assured him he is not taking a major risk if he keeps playing. Cameron said tests on his brain indicate he has not sustained any major damage and that his baseline test is the same as it was six years ago.Cameron spoke with former teammate Ben Watson, now with New Orleans. Watson, who spent three seasons with the Browns, has also sustained numerous concussions. The talks with Watson put Cameron at ease as did the information hes received from medical experts. Although its hurting his career — Cameron is in his final year under contract — hes not going to do anything to jeopardize his life.Everyone plays injured, he said. This is one of those things you cant really play through, and thats the problem with football players. Weve been told our whole life Youre fine, keep playing, but this is one of those things you cant. I couldve played two weeks ago but it wouldve been terrible for my brain. You cant push it. Youve just got to sit down and listen to the doctors and trust your symptoms.Cameron has just 13 catches for 250 yards this season after getting 80 for 917 last year, wheen he scored seven touchdowns and made the Pro Bowl.ddddddddddddHe doesnt think his rash of concussions will be a detriment to negotiating a new deal.You look back at the concussions that Ive gotten, its not like Im a fragile person, he said. Its not like I took a little hit and got a concussion. Ive taken some hits that were serious and I think anyone in that situation they would have gotten a concussion. Its not like if I get hit a little bit Im done or anything. They can watch the tape and theyll know anyone would have a concussion in these situations.Cameron said he never considered retiring.Not once, he said. The last two years, Ive had a whole off-season to recover and I felt nothing. Im not looking at the TV like I cant see. Im not having conversations and blank staring at people. Im fully back to normal.Cameron is thankful that players are more aware of the potential dangers from head injuries. While dealing with pain is part of life in the NFL, its different when it comes to the brain.Back in the day, you know it was, I got my bell rung and you would still play and the effects that has later in your life. We know that now that you cant do that and I think just being proactive with these things and understanding the situation and just being patient and listening. If you feel something, youve got to tell them. Youve got to be honest.NOTES: The Browns have had preliminary discussions with the NFL about the possibility their game in Buffalo could be moved next week. Because of heavy snow, the Bills are playing the New York Jets in Detroit on Monday. I do know theyre facing potential flooding with rain and warmer temperatures this weekend, coach Mike Pettine said. When Monday comes, Im sure well turn our eyes that direction and kind of see where we are with it. ... Browns starting LB Karlos Dansby (knee) did not practice and is listed as doubtful (25 per cent chance of playing) for Sunday. LB Jabaal Sheard (foot) was limited in practice and is questionable. ... Browns backup QB Johnny Manziel thought he was going into the game last week after Brian Hoyer took a hard hit from Houstons Brian Cushing. Manziels first thoughts? I need to find my helmet. I need to take this ear piece out. Manziel said the Browns have not practiced the Johnny Package of plays as much as they did earlier in season.___AP NFL website: www.pro32.ap.org and www.twitter.com/AP_NFL ' ' '