Bernie Ecclestone has suggested Mercedes and Ferrari will quit Formula One in the near future and cast doubt over the Singapore Grand Prix staying on the calendar beyond 2017.Speaking in a wide-ranging interview with German publication Auto Motor und Sport, Ecclestone addressed the issue of the next Concorde Agreement, which contractually binds the top teams to the sport. Ecclestone says there are no guarantees Mercedes, the reigning world champions, and Ferrari, arguably the most iconic team in the sport, will remain when the next deal is put in place in 2020.It could happen to us that Mercedes and Ferrari run away, Ecclestone said. But honestly, if the races get better, this may not be such a terrible vision.We have to expect the manufacturers to leave us anyway. Mercedes will retire on the day when it suits them and its something we had before -- look at Honda, BMW and Toyota. They go when Formula One has done the job for them. There is no gratitude.Ecclestone also used the interview to talk about ?future of the Singapore Grand Prix, which has a contract in place until the end of 2017. The F1 CEO does not think promoters will want to extend their contract after next years race as they have achieved what they wanted from the event, which is now one of the most popular on the calendar.It is the same with the organisers. Look at what we have done for Singapore. Yes, the Grand Prix has cost Singapore a lot of money, but weve also given them a lot of money.Singapore was suddenly more than just an airport to fly to or from somewhere. Now they believe they have reached their goal and they do not want a grand prix anymore. Wholesale Maple Leafs Jerseys . Ibaka equaled a career high with 20 rebounds, adding four blocked shots and 15 points as the Thunder smothered the Milwaukee Bucks offence in a 92-79 victory Saturday night. Cheap Maple Leafs Jerseys China . 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Cheap Toronto Maple Leafs Jerseys .J. -- Marty Brodeur beat the Pittsburgh Penguins yet again.Derbyshires elite performance director Graeme Welch hopes lessons have been learned from a poor 2015 campaign as the squad prepares to kick off a new season. Much has changed at Derby since the end of 2015, when they finished eighth in Division Two of the County Championship and made little or no impact in one-day and Twenty20 cricket.Leading wicket-taker Mark Footitt was tempted away by promoted Surrey, but hopes are high of a better season at the County Ground with a number of exciting new faces on board. New Zealand international Hamish Rutherford should improve the top of their batting order, and compatriot Neil Broom has also joined the squad - he has a UK passport so can play as a home recruit - while the depth of their bowling attack has been boosted by the addition of Andy Carter and Tom Milnes.As well as the on-field changes there is plenty going on behind the scenes - a new media centre is being built and stands have been moved.We learned a lot of experiences last year, Welch told Sky Sports News HQ as preparations continued for their opening match against Gloucestershire on April 17. Hamish Rutherford is back for another stint at the County Ground Weve added Neil Broom and Hamish Rutherford to stabilise the middle order, Andy Carter has come in to replace Mark Footitt and Tom Milnes as well, so we are looking a little bit more experienced.The lessons learned from last year should stand us in good stead. Well be a lot more competitive than last year, were more experienced and well be looking to win every game. Were quietly confident. Dominic Cork and his son Greg re-enact the last over of the World T20 final between England and the West Indies.dddddddddddd Welch also expects much more from Derbyshire in Twenty20 cricket in 2016, with the Falcons managing to win just four of their 14 matches last season to finish bottom of the North Group for the second year running.Twenty20 has taken over across the world. The World T20 was a great tournament, and I watched virtually every game. I took a lot of new tactics from it, but its still just down to executing the skills, he added.Its all about dealing with the situation. We have to put the practice in and execute. Also See: County ins and outs ECB confirms coin toss change Hampshire first up for Yorkshire Live cricket on Sky ' ' '