Usain Bolt says he agrees with the International Olympic Committee’s (IOC) decision to take action against Russia over doping. The Court of Arbitration for Sport (CAS) has rejected the appeal by the Russian Olympic Committee and 68 Russian athletes to compete at the Rio Olympics.Bolt, a six-time Olympic champion, is in London to compete in the Anniversary Games this weekend and believes banning Russias track and field athletes from competing in Rio de Janeiro would be the right thing to do. If you have proof and you catch somebody, I definitely feel you should take action, he said.If you feel banning the whole team is the right action, then I am all for it. Rules are rules and the doping violations in track and field are getting really bad.This will scare a lot of people, or send a strong message that the sport is serious about cleaning up. CAS rejects Russia plan The Court of Arbitration for Sport has rejected Russias appeal to compete in Rio Olympics Bolt also issued a positive update on his fitness, insisting he is in good shape as he prepares to compete in his first 200m of the season on Friday night, having been forced to pull out of the Jamaican trials with a hamstring strain.Im feeling good, been training good now, Im happy with where I am, he added. My hamstring is good, I have no issue right now. I know Im in good shape. Bolt was speaking at a news conference on Thursday When I got to the doctor he said if I had competed [in the trials] I would probably would have torn my hamstring really badly.I made the right decision. My coach always makes sure I put my health first. But I was never really worried because my coach always figures out a way to adjust the programme.I was in pretty good shape before I had to pull out, so I wasnt really worried. This will scare a lot of people, or send a strong message that the sport is serious about cleaning up. Usain Bolt on Russia Olympics ban Bolts appearance at the Olympic Stadium, the scene of his three Olympic gold medal wins at London 2012 in the 100m, 200m and sprint relay, will be his last before this summers Games in Brazil, where he will bid for an unprecedented triple triple of Olympic crowns.The 29-year-old also confirmed he will try to break his own 200m world record of 19.19secs, set at the 2009 World Championships in Berlin. Bolt is aiming to break his 200m world record at the Rio Olympics Ill definitely be there, Im excited to go, said Bolt.This is where history is going to be made, Im excited to put on a show for the entire world to see. This is my final Olympics, its a big one.I think the competition, the energy, the work they have to put in to win the 100m in Rio will help my 200m and thats really my focus, trying to break the 200m world record. 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"We dont know how much because we need to see how hes going, but hes available," U.Back in the sport as a works team for the first time since selling a majority stake in the Enstone squad to Genii Capital at the end of 2009, Renault have to deliver on track to justify the huge investment the French manufacturer have made. With the Renault name on the chassis and the engine there can be no hiding place, and while the team are already downplaying expectations, they certainly dont want to be embarrassed on their return.We need to be humble in our expectations for next year, explained Renault Sport boss Cyril Abiteboul. It is at least a team the firm know well. Not only did Renault previously own the team between 2000 and 2009 but they were also engine suppliers between 1995 and 2014 for the team during its various guises as Benetton, Renault and Lotus. That familiarity should accelerate the process of transition in 2016.This integration is not just measured in track performance, its measured by how you optimise the resources available. Its not an exercise in winning at all costs ; its an exercise in winning in a controlled manner, said chief technical officer Bob Bell. Renault felt they didnt get enough recognition for their contribution to Red Bulls dominance of F1 at the turn of the decade. Having had their reputation dragged through the mud over the past two seasons in a public war of words with Red Bull over power unit performance, they could have been forgiven for walking away from the sport.However, the board should be commended for wanting to prove they can compete at the highest level. Asked what the goals were for the season ahead Bell said: Merging the two operations towards becoming one entity, more than they have ever been before.There will undoubtedly be troubles in this year, though, given the lateness of the deal. Lotus ran Mercedes engines in 2015 and were contracted to the German marque for 2016. The car design is likely to be compromised by the late switch of engine to accommodate the Renault unit.But that will be the least of the teams worries if the power unit continues to lag a long way behind Ferrari and Mercedes. The team at the engine base in Viry-Chatillon must make giant strides for Renaults investment to make sense. Quite what impact Mario Illien has - and the deal for Red Bull to run TAG-Heuer branded Renault unit have - remains to be seen.The power unit guys have done a fairly decent job over the winter, Red Bull boss Christian Horner told Sky Sports during testing. I think what we are hopeful of is further dowwn the line into the season when hopefully that power unit develops what it is saying it should do.dddddddddddd Then we should be able to start competing with some of the teams ahead of us.In an ideal world for Red Bull they wouldnt have had Renault engines in 2016 due to the units performance and that can only be regarded as an embarrassment for a firm which pushed hard for the new regulations. Big steps are needed this year or there is the very real possibility of the works team receiving a sole supply by default rather than choice.Renaults own form in testing was mixed. While the opening two days of testing were blighted by unreliability, the team finished the eight days of running with over 2200 miles completed. But the RS16 was a regular cause of red flags throughout testing. The loss of Romain Grosjean is a major blow, and the team will head into 2016 with one of the least experienced line-ups on the grid in Kevin Magnussen and Jolyon Palmer.Palmer at least knows the team after a season as reserve driver, but as a rookie he cannot be expected to lead the team. That responsibility is likely to fall on the shoulders of Magnussen who has just one season of F1 under his belt and spent 2016 on the sidelines after being dropped by McLaren.And its McLaren who Renault could be battling in 2016 based on pre-season testing. The French firm seem to be quicker than Haas, Sauber and Manor at the rear of the field, but adrift of the Williams, Red Bull, Force India, Toro Rosso fight behind Ferrari and Mercedes.That could leave the team fighting for minor points places on occasion this year with McLaren - hardly ideal for one of only three works teams on the grid.This very much will be transitional year for Renault and expect focus to quickly shift towards their 2017 car as the French firm look to rebuild the Enstone team and return to the glory years of 2005 and 2006.Even if the results are not seen on track, the ground work laid this season could dictate how successful Renaults return to F1 is. The first race of the 2016 F1 season, the Australian GP, is exclusively live on Sky Sports F1. The race in Melbourne starts at 5am on Sunday March 20. Every race live in 2016 Sky Sports F1 brings you every race live in 2016. Fast and easy online upgrade - click here. Also See: A big year for... 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