VIENNA, Austria -- Mercedes motorsport boss Toto Wolff has praised the bravery of Nico Rosberg after the newly-crowned world champion announced his retirement from Formula One on Friday.Just five days after sealing his first world title in Abu Dhabi last weekend, Rosberg made the surprise announcement at a press conference ahead of the FIA prize giving gala in Vienna. The news leaves Mercedes with a huge decision as it prepares to replace the 31-year-old over the winter, but despite the headache it creates, Wolff -- who found out on Tuesday -- said he could not help but be impressed by the Rosbergs decisiveness.This is a brave decision by Nico and testament to the strength of his character, Wolff said. Weve known each other for four years now and one thing I admire with Nico is his clarity of thinking. Its black and white.Although you could have argued after three days of celebrating you need to become sober in order to take a decision! But that is not with Nico, he knows exactly what hes doing, hes in control of his thinking, so from the first moment he told me there was no doubt that this is the decision.Rosberg admitted he did not want to tell Wolff the news face to face as they returned from a series of press briefings in Malaysia, so instead waited until they were apart and informed his boss over the phone.I knew there was something as we spent a long time on the plane having dinner and talking about a lot of things, Wolff said. The moment I left the lounge in the morning to jump on the plane to Stuggart, Nico was going to Weisbaden, he called me. I said Im coming back, he said dont come back!Wolff said there was no doubt Rosberg is bowing out as a deserving world champion.The result shows he won the world championship and he is the best driver in Formula One today. The points show that. The way I have perceived the last couple of races is that he was incredibly professional and did what was needed. That incredible winning streak at the beginning of the season built the foundations, and he just drove it home.The Mercedes boss said Rosberg leaves big shoes to fill on several levels.Hes left a huge legacy, first of all the way hes decided to leave Formula One is something thats unheard of, something that all of us admire in a certain way, to call it a day when youre at the top. Hes been part of the development since the early days and such a strong competitor. The team has performed because the balance is right between the drivers and the dynamics within the team, travelling to 20 grands prix a year, the energy is hugely important and Nico was a big contributor to that energy in the team. I could go on for ten minutes...Besides the know-how, his skill as a driver, setting up the car, giving us direction on the set-up and the development of the car, direction on how to put the car on the race track, the interaction with Lewis and the engineers.LeBron James Shoes Deals . 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Banks told TSN on Jan 2 that he had no interest in playing out the option year of his contract with the Lions in 2014, and he again made that clear in a conversation with Lions GM Wally Buono last week.DETROIT -- The Detroit Pistons have reached an agreement in principle with the city of Detroit and Olympia Entertainment for the team to move from the suburbs to downtown, according to a person with knowledge of the negotiations.The person spoke on condition of anonymity Monday because there had been no formal announcement. Pistons owner Tom Gores is set to appear at a news conference Tuesday with Detroit Mayor Mike Duggan and Christopher Ilitch, president and CEO of Ilitch Holdings.Gores acknowledged last month that the team was close to a deal to leave The Palace of Auburn Hills and start playing downtown next season. The Pistons have been in talks about playing at the new arena that is being built for the Detroit Red Wings, who are owned by Mike and Marian Ilitch. The arena site is about 30 miles from Auburn Hills.Olympia Entertainment, a division of Ilitch Holdings, handles business operations for the Red Wings, who are in their final season at Joe Louis Arena before moving to Little Caesars Arena.The new arena is in the same part of downtown where the Tigers and Lions host their games, and not far from where Gores and Dan Gilbert have been hoping to put a new stadium for a Major League Soccer team.The Pistons have played in Auburn Hills since 1988 and played at the Pontiac Silverdome for a decade prior to that.dddddddddddd The team was downtown when it called Cobo Arena home from 1961-78.The Palace was built with private funds by William Davidson, who owned the Pistons before his death in 2009. The team won championships in its first two seasons in Auburn Hills and again in 2004. Although the atmosphere slipped in recent years as the team went through a rough stretch on the court, Detroit returned to the playoffs last season for the first time since 2009, and the Pistons appear headed in the right direction in Stan Van Gundys third season as their coach and team president.Gores bought the Pistons from Karen Davidson in 2011. He said last month that if the team did leave the Palace, it was important to remember the success the franchise had in that area.I think we have to be really mindful of this community in Auburn Hills and their loyalty in showing up, he said. This has been a real community, and I want them to feel the same wherever were playing.---Follow Noah Trister at www.Twitter.com/noahtrister ' ' '