Sebastian Vettel admits Ferraris early-season reliability problems have caught them by surprise - but does not believe they are a consequence of the team pushing to catch Mercedes. The Scuderia have lost one car to unreliability in each of the seasons opening two rounds. Kimi Raikkonen dropped out at the Australian GP after a turbo failure caused an airbox fire, while Vettel did not even take the start in Bahrain on Sunday after his car started trailing smoke on the formation lap.Although Ferrari are yet to confirm the cause of Vettels failure, team boss Maurizio Arrivabene said initial investigations pointed to a broken valve or injector. After problems with their redesigned power unit during winter testing, speculation in Bahrain suggested Ferrari were still wary of pushing it to the limit.Reliability has long been one of the Scuderias strengths but, asked by Sky Sports News HQ if their recent frailties were a by-product of pushing hard, Vettel said: Not really.We sorted out our problems over winter and starting the season it was a surprise what happened to Kimi. Today was a surprise again so we need to understand what happened and learn. However, team-mate Raikkonen, who managed to split the Mercedes pair in Bahrain to finish second, accepted Ferraris push to overhaul the world champions was not without risk.For sure they will [improve reliability], but its sport where things can go wrong and things can happen, the former world champion said.Always pushing the limit sometimes things go wrong. Its not ideal, thats not what were looking for, but were pushing where we want to be, in the front.Raikkonen finished just six seconds behind race winner Nico Rosberg, although the German admitted he was managing his pace at the front. Ferrari were again beaten by both Silver Arrows in qualifying, although had been challenging in Q3.We are nearly there in qualifying, Arrivabene told Sky F1. Theres a long way to go, so we need to work hard and be concentrated on our performance on the race. Ted Kravitz brings you all the latest news following the Bahrain GP Speaking to written media later, the Ferrari chief admitted he was frustrated to lose Vettels car before the race had even started, although was full of praise for Raikkonens absolutely spectacular recovery after a terrible start.One, Im not happy at all because with this strategy and looking at the performance of Kimi I think we were able to do a very, very good race with Sebastian, the Italian said.Having said that, Kimi had a bit of problem at the start and I think that penalised him quite a lot because he overtook three guys ahead of him and maybe, and I underline maybe, he compromised victory of the race.The way that Kimi drove during the race was spectacular - absolutely specular. If you look at the overtake on the external part of the kerb with Ricciardo, he reminded me of the drivers in the old times when they were battling and they were brave. It was very, very good. Kimi Raikkonen had to retire his Ferrari on lap 23 of the Australian GP, after suffering a fire in his airbox Also See: Vettel leads driver qualy anger Martin Brundle column David Robinson Jersey . -- Masahiro Tanaka knows that first appearance in a spring training game for the New York Yankees will be scrutinized. Matt Bonner Spurs Jersey . When Reyes signed a US$106-million, six-year deal with Miami last month, there was speculation Ramirez was unhappy about being supplanted at short. But new manager Ozzie Guillen sold Ramirez on the idea. http://www.authenticspursauthority.com/t-shirts-c-1/ . Pistorius mindset when he stood on his stumps in a bathroom and pulled the trigger on his 9 mm pistol in the early hours of Feb. 14, 2013 remains the crux of the South African trial that has captured worldwide attention and is about to start its seventh week of globally televised proceedings. It was initially scheduled to run for three weeks. Spurs Hoodie .Balotelli uploaded on Instagram a picture of the video-game character Super Mario, with whom the Italy international shares a nickname, with text around the image including jumps like a black man and grabs coins like a Jew. Kyle Anderson Jersey . -- Southern Illinois coach Barry Hinson couldnt hear himself amid the roar in Koch Arena, so he kept stomping on the floor in a fruitless attempt to get his teams attention.Two-time Major champion Martin Kaymer is the latest name to confirm his entry for this month’s BMW PGA Championship at Wentworth. The German will make his tenth consecutive appearance in the tournament from May 26-29, where he has finished inside the top-20 five times but never better than tied-11th.Kaymer joins a strong line-up for the €5million event, with Masters champion Danny Willett, world No 10 Justin Rose and Ryder Cup hopefuls Andy Sullivan and Matt Fitzpatrick already in the field. Martin Kaymer finished last years tournament in a tie for 18th The 31-year-old has dropped out of the worlds top 50 having failed to reach the winners circle since the 2014 US Open, but heads in to a busy stretch buoyed by a tied-sixth place finish at Valderrama last month.Its always a special week as it is played at a very famous, iconic venue that has a lot of history, Kaymer said. After my home country of Germany, the UK is probably my favourite place to play golf, and at Wentworth there are always great crowds creating a fantastic atmosphere. The German has slipped to world No 59 I have a decent record at Wentworth but Ive not yet been truly in contention to win there, so it would be nice to change that this year.ddddddddddddMy game is feeling good and a victory would be a great way to launch into what is going to be an extremely busy spell through the summer and autumn.The announcement follows the confirmation on Wednesday that former champion and world No 3 Rory McIlroy wouldnt be taking part in the tournament, blaming a busy schedule. Rory McIlroy will play three weeks in a row before missing Wentworth Graeme McDowell, Luke Donald, Jamie Donaldson, Victor Dubuisson and Lee Westwood are among those all set to feature in the tournament.Watch the BMW PGA Championship from May 26-29 live on Sky Sports - your home of golf Also See: 2015 recap: An takes title Willett confirmed for Wentworth EuropeanTour Schedule Golf live on Sky Sports 4 ' ' '