Mercedes have topped the testing timesheets for the first time in 2016 as F1s world champions gave a first true glimpse of their new cars potential. After prioritising reliability over performance running in the first week of testing in Barcelona, Mercedes began to take the shackles off the W07 on the opening day of the final test - and with ominous results for their rivals.Nico Rosbergs morning in the car produced the fastest times seen at testing on the soft and medium tyre. Mercedes times were half a second quicker than Ferrari have managed on either compound so far.Rosbergs best soft tyre lap of 1:23.022 was also just two tenths shy of the fastest overall time set last week by Sebastian Vettel on ultrasofts - a compound which has a performance advantage of over a second. Mercedes driver Nico Rosberg looks in fine form during the final pre-season test Rosberg: Its very close between Mercedes and FerrariHowever, despite their apparent advantage of half a second, Rosberg told Sky Sports News HQ: Its very close between Ferrari and us - and another team might be there as well.Lewis Hamilton took over the W07 in the afternoon and finished sixth after running exclusively on the slower medium tyres.Williams gave little indication of their form in week one, but also enjoyed an encouraging Tuesday. Valtteri Bottas clocked the days second-quickest lap, set on ultrasoft tyres, having already set the second best time of either test on soft tyres.Sky Sports F1s schedule for the second Barcelona testWhile McLaren-Honda are unlikely to be in the fight at the front in the short-term, the under-pressure team delivered arguably their best day of testing since the partnership was revived 12 months ago.Fernando Alonso finished third on the timesheets after taking the soft tyres to a lap of 1:24.735. After stumbling on the final two days of the first test, McLaren completed 92 laps with their only delay occurring when a telemetry problem stopped the MP4-31 on track just before lunch.This weeks test is the really important one, Jenson Button told Sky Sports in an exclusive interview ahead of his return to the car on Wednesday.McLaren boss Eric Boullier told reporters on Monday that he expected massive gains from the team this season. Test One: How every team rated Mercedes and Ferrari impress - but as for McLaren... Ferrari too ran into their own reliability problems, with Kimi Raikkonen losing two hours of track time after his SF16-H became stuck in eighth gear. The Finn was fourth with 72 laps.Although the Raikkonen did clock Ferraris fastest time of testing on medium tyres, his 1:24.836 was half a second slower than Rosbergs own medium-tyre effort.We have a good feeling, said Raikkonen. We have for sure made quite a good progress over the winter. I think were more or less where we want to be. Ferrari does its best to conceal any 2016 upgrades from competitors at Formula Ones pre-season testing in Barcelona Red Bull finished fifth with Daniil Kvyat but ran into more lengthy delays after the RB12s rear brakes caught fire in the pit lane.However, Haas endured the most disappointing Tuesday of all as their VF-16 ran for just 23 laps in the morning before a fuel pump problem curtailed Esteban Gutierrezs day.Its the first time that has cropped up, said Haas team boss Guenther Steiner. We needed a bit of time to react to it and we will be out again [on Wednesday].We are working on it now. We used the afternoon to simulate like a race weekend to go to the FIA to check the car for deflection [tests].Barcelona Test Two, Day One timesheet1. Nico Rosberg, Mercedes, 1:23.022, soft tyres, 82 laps2. Valtteri Bottas, Williams, 1:23.229, ultrasoft tyres, 123 laps3. Fernando Alonso, McLaren, 1:24.735, soft tyres, 93 laps4. Kimi Raikkonen, Ferrari, 1:24.836, medium tyres, 72 laps5. Daniil Kvyat, Red Bull, 1:25.049, soft tyres, 69 laps6. Lewis Hamilton, Mercedes, 1:25.051, medium tyres, 90 laps7. Max Verstappen, Toro Rosso, 1:25.176, medium tyres, 144 laps8. Nico Hulkenberg, Force India, 1:25.336, soft tyres, 121 laps9. Felipe Nasr, Sauber, 1:25.493, soft tyres, 103 laps10. Kevin Magnussen, Renault, 1:25.760, soft tyres, 119 laps11. Esteban Gutierrez, Haas, 1:26.661, medium tyres, 23 laps12. Rio Haryanto, Manor, 1:27.699, medium tyres, 45 laps 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 in 2016: The Sky F1 previews The latest videos from Barcelona Wholesale Nike Shoes . Reigning world champion Eve Muirhead of Scotland opened with a 12-2 rout of Winnipegs Jennifer Jones in a battle of teams bound for the 2014 Winter Olympics in Sochi. Cheap Shoes From China . The 43-year-old closer, in his 19th and final big league season, has said hed like to play the outfield. 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The 19-year-old from Westmount, Quebec earned a 6-1, 7-6(2) victory over Tsveetana Pironkova of Bulgaria on Monday to advance to the second round.dddddddddddd. This will be the second time that Bouchard has faced Sharapova. The two met at the Sony Open in Miami back in March with Sharapova cruising to a 6-2, 6-0 victory. The 26-year-old Russian star is the defending champion at Roland Garros and won her first round match in straight sets over Su-Wei Hsieh of Taiwan. ' ' '