CHARLOTTE, N.C. -- Carolina Panthers Pro Bowl linebacker Luke Kuechly and center Ryan Kalil have been ruled out for Sundays game at Oakland, coach Ron Rivera said on Friday.Also, the Panthers placed left tackle Michael Oher on injured reserve. Oher missed the past seven games with a concussion and there was no timetable for his return.Kuechly, the 2013 NFL Defensive Player of the Year, suffered a concussion in the fourth quarter of the win over New Orleans on Nov. 17 and has not been at practice all week.Neither has Kalil, who re-injured the shoulder that kept him out of two starts prior to the New Orleans game.Both players were scheduled to travel to the West Coast with the team Friday, and Rivera said that was an indication they possibly could be available to play at Seattle on Dec. 4.The Panthers are practicing at San Jose State next week in preparation for the game against the Seahawks instead of returning to Charlotte.Its very important, Rivera said of having Kuechly and Kalil make the trip. For the obvious reasons going forward, communication, helping their teammates, and not just the moral support, but what they know about the game. Its kind of like having another set of coaching eyes on the sideline.Defensive end Mario Addison (foot) will not make the trip. The Panthers activated end Ryan Delaire, who had been on injured reserve, to the 53-man roster.A.J. Klein, who missed the New Orleans game with a concussion, will start for Kuechly.Klein started all three games last season that Kuechly missed with a concussion suffered in the opener at Jacksonville.I feel really good about who A.J. is as a football player for us, Rivera said. Hes done some really good things. He has started inside and outside for us. We always talk about position flexibility. Well, this guy has proven it.Gino Gradkowski is expected to start for Kalil. He started the previous two games missed by the five-time Pro Bowl player, but sat out of the New Orleans game with a knee injury.The decision to place Oher on injured reserve was made in part because the organization needed roster spots due to other injury situations and in part because of the uncertainty of his return and how long it would take to get him back into football shape.The Panthers signed guard/center David Yankey and cornerback Lou Young off the practice squad. In addition to Oher, the Panthers placed rookie corner Zack Sanchez on injured reserve.We did everything we could, Rivera said of Oher. We tried to be with him and help him out as much as we could. Its tough. Its just one of those things. The further long you go, the tougher its going to be to get him back in shape.Marcus Smart Celtics Jersey . Down by seven with 90 seconds left in regulation, thats where they looked comfortable. Paul Pierce Celtics Jersey . 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"I just love the fact I am in contention and have an opportunity in my first tournament of the year here in Abu Dhabi," Mickelson said.LONDON -- Novak Djokovic survived an early setback, and then made it look all too easy.The second-ranked Serb, who has a chance to reclaim the No. 1 ranking at the O2 Arena next weekend, rallied to beat Dominic Thiem 6-7 (10), 6-0, 6-2 Sunday in his opening match at the season-ending ATP finals.Djokovic won nine of 10 games to take control of the match after losing the first set in a tiebreaker. And even that was close.Yeah, a thrilling tiebreaker, Djokovic said. I had, I think, only one set point. He just played a good point. I was in the rally, but he just was going for his shots.Thiem had his first three set points at 6-3 in the tiebreaker, but he double-faulted twice and then put a backhand into the net to make it 6-6.Djokovic had a chance, too, leading 9-8. But he couldnt close it out with Thiem serving, eventually hitting a backhand long. The Austrian finally won it on his seventh set point with a forehand winner, prompting Djokovic to smack a ball into the crowd.After that, it was just about all Djokovic. The Serb reeled off six straight games to send it to a third set, and then broke Thiem twice more to close it out.Even though I lost the first set, I thought I didnt do too many things wrong, said Djokovic, who saved the only break point he faced. It was just the very high quality of his game that prevailed in the first set.In the following sets, it got to be too much for the Austrian, who was making his debut at the tournament for the top eight players in the world.I lost a little bit energy, not much, but just a little bit (after the first set), Thiem said. Of course, against a player like Novak, he immediately steps up. Thats how the second set went.Thiem said he had a chance to meet Manchester United manager Jose Moourinho after the match, and the pair chatted briefly.dddddddddddd Thiem is a fan of English club Chelsea, a team Mourinho has coached in the past.In the late match, fourth-seeded Milos Raonic of Canada beat sixth-seeded Gael Monfils of France 6-3, 6-4.Monfils, who was playing at the ATP finals for the first time, hit a pair of tweeners in the match, but it was Raonic that got the breaks -- one in each half.Djokovic lost the No. 1 ranking to Andy Murray last week, but he can earn it right back in London. If either of the two wins the title next Sunday, that one will be assured of the top ranking -- as long as Djokovic wins another round-robin match on the way to the final.If Djokovic does reclaim the No. 1 ranking, he would finish the season at the top for the third season in a row and the fifth time in six years. Murray is trying to end up as the top man for the first time.With a victory on Sunday, Djokovic can also join Roger Federer as the only players to win the season-ending tournament six times. Federer is not playing in London, sitting out the rest of the season as he continues to recover from knee surgery.Djokovic has had his own injury problems this season, including pulling out of the China Open with an elbow injury in September. In Sundays match, he called for a trainer during the first changeover, but it was because he hurt his thumb on the court after reaching for an early shot.It was just a nasty cut that I had when I didnt manage to return the serve, the first serve, Djokovic said. Just kind of caught the surface, then I cut myself. It was bleeding. I just wanted to stop the bleeding. ' ' '