BARCELONA, Spain -- Nico Rosberg will use his frustration from the Bahrain Grand Prix for motivation when he starts the Spanish Grand Prix from pole position Sunday. The German driver finished ahead of Lewis Hamilton to give Mercedes front-row seats at the Circuit de Catalunya, with both drivers still seeking their first wins of the season in a car which has plenty of pace but has lacked durability over the first four races. Three weeks ago, Rosberg took pole in Bahrain only to finish ninth, and he is determined not to fall short again. "We know that this is only half of the job completed and have the painful memory of what happened in Bahrain to prove that," said Rosberg, who is chasing his first podium this season. "Weve worked very hard on our race pace but this track is tough for the tires, particularly with graining. It will be a big challenge tomorrow and our goal is to make the most of the opportunity from starting at the front." While Hamilton had the fastest times in the first two qualifying sessions, Rosberg edged him to win the pole position in 1 minute, 20.718 seconds. Three-time defending champion Sebastian Vettel was third quickest. "It will be a big challenge with the tires tomorrow," said Rosberg, whose best result this season was fourth at the Malaysian GP. "The race is very long and to win its not good enough to start from pole -- you still have to have the fastest race car." Hamilton, the 2008 Formula One champion, is unsure how much to read into his teams qualifying speed. "Ive not been totally happy with the balance of my car all weekend, even today, so we need to look at it this evening and see what we can do for the race," the British driver said. "Limiting the degradation is going to be my major challenge as the general pace isnt too bad." Vettel was satisfied enough with his performance as he finished ahead of Kimi Raikkonens Lotus. "Im quite happy to be honest because yesterday and this morning I wasnt really happy. We improved the car and things calmed down," said Vettel, who has 38 career poles but none in Barcelona. "Its a tough challenge and the tires dont last as well as we would like." The degradation of the Pirelli tires has been an issue all season, and drivers are largely unhappy about how quickly they wear out. Ferrari has yet to secure a pole position this season, and it proved to be another frustrating afternoon for the Italian team after fast practice times in the morning. Fernando Alonso will start fifth and Felipe Massa ninth. Massa finished sixth in qualifying but was bumped down three places for blocking Red Bulls Mark Webber on turns 11 and 12. Jenson Button failed to make the cut for the third session. The Briton will start in 14th place, with teammate Sergio Perez in eighth. "Weve had a difficult couple of days. I had problems throughout practice, so to get through to Q3 was a great result, and something we really werent expecting," Perez said. "Im very pleased because I got absolutely everything out of the car." Earlier, Massa was fastest in the third and final practice session ahead of Raikkonen. Webber was third in final practice but had a poor qualifying session and will start from seventh place, behind Lotus Romain Grosjean. They moved up a place due to Massas grid penalty, as did Perez. "I was disappointed with the lap in Q3 and lost a lot of time in the last sector," Webber said. "Im normally quite strong there, but I was in trouble with the rears." Ferrari wants its drivers to find extra speed in qualifying to increase the pressure on Red Bull. Once again, those hopes were unfulfilled. The closest Ferrari has been to pole was when Massa qualified second in Malaysia. Alonso started the previous three races from third. Mercedes has been fast but lacking durability this season, so Hamilton and Rosberg stayed on longer runs than other drivers in practice. "Its going to be tough to keep these positions tomorrow," Hamilton said. Scarpe Stan Smith Scontate . Numbers Game looks into the Canadiens securing the services of Thomas Vanek in a trade with the New York Islanders. The Canadiens Get: LW Thomas Vanek and a conditional fifth-round pick. Stan Smith Uomo Saldi .J. -- Marty Brodeur beat the Pittsburgh Penguins yet again. http://www.stansmithscontate.it/ . -- Catcher Brett Hayes has agreed to a $630,000, one-year contract with the Kansas City Royals, avoiding salary arbitration. Stan Smith Italia . -- Yogi Ferrell orchestrates pretty much everything in Indianas offence. Stan Smith Outlet Italia . Barcelona also left injured defenders Carles Puyol, Javier Mascherano and Jordi Alba out of its squad for the trip to Glasgow. That means that Marc Bartra will probably start again in the centre of the defence alongside Gerard Pique. NRL referees boss Tony Archer has defended the bunker in the wake of criticism of its decision to award Andrew Fifitas decisive try in State of Origin III.Queensland captain Cameron Smith has left scratching his head after the video referees gave the green light to Fifitas 41st minute four-pointer, despite Michael Jennings being in front of the kicker.Despite being in an offside position, Jennings was ruled to have been passive and not involved in the play.Blues coach Laurie Daley said the rule had been relaxed and according to the NRL it has been an interpretation since 2013.At the point in which the ball is kicked, Michael Jennings is in front of the player who kicks the ball, Archer said.When you see Fifita take possession of the ball, there are three Queensland players who have retreated back to the ball and Jennings is behind those and having no influence on the game at that point. So I understand the decision and it being the correct decision.The try was compared to a no try inn last years game III decider in which Johnathan Thurston was denied a try because Matt Gillett was in an offside position.dddddddddddd.However Archer said because Gillett handled the ball during the movement, he was deemed an active player and the try was turned down.But Melbourne, Queensland and Australian captain Smith hadnt got the memo about the interpretation being changed.My understanding is if a person is inside the 10m (when a try is scored after being) in front of the kicker, that is offside, Smith said.Im pretty sure last year we had a try taken off us. Matt Gillett might have been offside.That wasnt the refs ... that was the bunker that made that call, I understand that.But I didnt know we relaxed rules in our game.Maroons coach Kevin Walters agreed.I have to support Cameron, there, it was one of our things that didnt go our way, Walters said. ' ' '