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F1 in 2016 has officially begun with Ferrari giving an early tantalising glimpse of a potential head-to-head title fight with Mercedes on the opening day of Barcelona testing. Sebastian Vettel clocked a fastest time of 1:24.939 to outpace world champion Lewis Hamilton by half a second as Ferrari and Mercedes gave the full debuts to the cars which are expected to lead the way in the new season.But while Ferrari may have taken early bragging rights on the timesheet, Mercedes conquered the mileage charts with their W07 clocking an astonishing 156 laps - nearly double that of any other new car. Its been an amazing day, a beaming Hamilton said. Ive never had a Day One practice like today. Mercedes driver Lewis Hamilton completed 156 laps on day one of the first Barcelona Test, watch some footage of him on track in the W07. F1 in 2016: The new cars revealedLap times in testing are notoriously unreliable indicators of true form and Ferrari have topped Day One of testing in each of the last two years only for Mercedes to dominate the season. Vettels best time - which, like Hamiltons, was set on the medium tyres - was two seconds slower than the fastest of winter testing 12 months ago but was also just 0.3 seconds shy of the pole position time for last Mays Spanish GP. However, Nico Rosberg, who takes over the W07 from Hamilton on Tuesday, believes the Ferrari threat has grown.Ferrari are looking strong already and definitely we are expecting them to be a big threat, Rosberg told Sky Sports News HQ. It would be great if Ferrari are very, very close to us so long as they are never in front of us!Team boss Toto Wolff added: Were very happy that Ferrari look like they have a great car because that could be a great battle between the teams. Changes have been made to cars to make them louder but F1 expert Ted Kravitz thinks it still wont please some fans The new Ferrari and Mercedes cars ended up clear of the pack on the timesheet, with Daniel Ricciardo third in the Red Bull RB12 and Valtteri Bottas fourth in Williams FW38.Inevitably, after the teams worst season in history, plenty of eyes were on McLaren and engine partners Honda as the MP4-31 made its track debut at the Circuit de Catalunya. Twelve months after the tone of the teams season was set when its predecessor completed a disastrous six laps on day one at Jerez, the new car proved far more reliable out of the box with Jenson Button able to rack up 83 laps.However, team boss Eric Boullier earlier sounded a note of caution by stating that their performance was not good enough during the morning session. Button finished sixth and 1.8 seconds off the Ferrari pace - despite using the faster soft compound.Newcomers Haas, meanwhile, ran into more fundamental problems as their first F1 car, the VF-16, made its long-awaited debut. The Ferrari-engined machine suffered a front-wing failure down the circuits main straight, keeping Romain Grosjean in the garage for several hours. The Frenchman returned in the closing stages and finished 10th with 31 laps.After a delayed start, new Mercedes engine customers Manor wound up ninth with rookie Pascal Wehrlein - although it was a less successful day for fellow newcomer Jolyon Palmer whose Renault ran into problems and propped up the timesheet.Day One Timesheet1. Sebastian Vettel, Ferrari, 1:24.939, 69 laps;2. Lewis Hamilton, Mercedes, 1:25.409, 156 laps;3. Daniel Ricciardo, Red Bull, 1:26.044, 87 laps;4. Valtteri Bottas, Williams, 1:26.091, 80 laps;5. Alfonso Celis, Force India, 1:26.298, 58 laps;6. Jenson Button, McLaren, 1:26.735, 84 laps7. Carlos Sainz, Toro Rosso, 1:27.180, 55 laps;8. Marcus Ericson, Sauber, 1:27.555, 88 laps;9. Pascal Wehrlein, Manor, 1:28.292, 54 laps;10. Romain Grosjean, Haas, 1:28.399, 31 laps;11. Jolyon Palmer, Renault, 1:29.356, 37 laps.F1 is back: The best pictures of the cars on track in BarcelonaKeep up to speed with all the latest news, pictures and video from all eight days of F1 testing via the daily live blog on the Sky Sports website and mobile apps. Sky Sports News HQ will also broadcast regular updates from trackside in Barcelona. Every race live in 2016 Sky Sports F1 brings you every race live in 2016. Fast and easy online upgrade - click here. Also See: F1 gossip column Every 2016 race live Daniel Hudson Nationals Jersey .Y. - Detroit goaltender Jonas Gustavsson has earned NHL first star of the week honours after winning in his first three appearances of the season. Washington Nationals Pro Shop . 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WINSTON-SALEM, N.C. -- Wake Forest is changing quarterbacks, with Kendall Hinton starting this week against Delaware after leading the Demon Deacons past Duke.Coach Dave Clawson announced the change Tuesday, saying Hinton can throw it, and the more he plays and the more comfortable he gets hell show it.Hinton played the final 2+ quarters against the Blue Devils and led all four scoring drives in the 24-14 victory. He rushed for 63 yards on 11 attempts and was 6 of 11 for 133 yardds with a 62-yard pass to Alex Bachman for Wake Forest (2-0, 1-0 ACC).ddddddddddddThe Demon Deacons quarterback situation has been back-and-forth all season with Hinton and junior John Wolford splitting time. Hintons only career start came in a loss to Indiana last year when Wolford was injured.---AP College Football website: www.collegefootball.ap.org ' ' '