MONTMELO, Spain -- Sebastian Vettels practice session at the Spanish Grand Prix ended with the four-time defending Formula One champion hitching a ride on a scooter after his Red Bull puttered out. Lewis Hamilton had no such problems, finishing Fridays opening day of practice with the top times from both training sessions as the dominating Mercedes team showed no signs of slowing down. The British driver is looking for his fourth straight win this season. Mercedes teammate and F1 leader Nico Rosberg was right behind, setting the afternoons second best time after his crew fixed a cooling issue. Vettel was running through his fifth lap on the sunny and dry 4.6-kilometre (2.9-mile) Circuit de Barcelona-Catalunya when his Red Bull came to a halt. He then helped push his RB10 out of the path of his rivals before a group of fans gathered at the fence to take photographs of the champion using a fire extinguisher on the rear of his malfunctioning car. After Vettel was whisked back to the paddock on the back of a scooter, Hamilton clocked the fastest lap time in the opening session and then bettered that by almost 1.5 seconds in the afternoon with a mark of 1 minute, 25.524 seconds. Red Bull said an electrical problem that "damaged the wiring" of Vettels car meant he couldnt return for the afternoon practice session. That left Vettel with only one session on Saturday before qualifying. "Its a small failure, but a big consequence," Vettel said. Red Bull had given Vettels car an older chassis in a move the German called a "sanity check" to try to find an elusive answer to his cars lack of pace. The Austrian team renowned for its design had a bigger problem than speed, however, when Vettel was left stranded just after the fifth turn. Vettel is having his worst season at Red Bull with only one podium finish so far and sits in a distant fifth place in the standings. He has even had to let new teammate Daniel Ricciardo pass him twice during the last two races. And Ricciardo emerged from the opening day of practice as the closest thing the grid can offer as a threat to the Mercedes duo by recording the third best time in both sessions at almost a second behind Hamilton. Hamilton trails Rosberg by four points despite having won the last three races in front of his teammate. The pair have won all four races and taken all four pole positions this year. Hamilton hasnt lost a step after a three-week break and showed that the other teams have yet to make headway despite their upgrades for the start of the seasons run of European events. "Its been a great day today and Im happy to be back in the car after what feels like quite a long break," said Hamilton. "Our two practice sessions today went very smoothly, in fact Ive not had such a good Friday for a very long time." Last years race winner, Fernando Alonso, had the fourth best effort in both sessions, while Ferrari teammate Kimi Raikkonen could do no better than fifth in the afternoon. Ferrari chairman Luca di Montezemolo said he was "not happy" with his team and that he would work closely with new team principal Marco Mattiacci to "improve the situation as soon as possible." Pablo Maldonado of Lotus recorded the most laps through both 90-minute sessions with a total of 76. The early session to prepare for Sundays race featured some close calls. Sergio Perez had to box when the left mirror on his Force India car became detached. The Mexican driver had to grab it and drive one-handed while coming in. Sauber test driver Giedo Van der Garde survived a bigger scare when he told his team he had "a break failure" and ran off course, barely missing the wall. In the second session, Romain Grosjeans Lotus stalled at the end of the pitlane, while Jean-Eric Vergne lost the right rear wheel of his Toro Rosso. Max Chilton twice had to come in due to engine trouble before a piece of his Marussia went flying on his next trip out. He ended the day by driving into the sand. Cheap Adidas Blue Jackets Jerseys . -- Conner Bleackley got it done in regulation time and in the shootout. Cheap Blue Jackets Jerseys Authentic . With newly minted president of hockey operations Trevor Linden looking on from above one day after being handed the keys to the franchise, it was more of the same on Thursday night. http://www.cheapbluejacketsjerseys.com/ . Hes just beginning to get similar results. The right-hander struggled after winning the honour in 2008 and 2009, but a retooling of his game has begun to pay off and has the San Francisco Giants thinking about the Lincecum of old. Cheap Blue Jackets Jerseys China . Still, Milan remained five points behind city rival Inter Milan in the race for fifth place and the final Europa League berth, after Inter beat 10-man Parma 2-0. Meanwhile, Paul Pogba led the way as Juventus stayed on course for a third consecutive title with a 1-0 win over relegation-threatened Bologna. Cheap Adidas NHL Jerseys . The 22-year-old slugger, who is no stranger to adversity, made up for it at the end.Cricket South Africa (CSA) will formally introduce racial quotas at national team level, the board has revealed. The organisation has come under fire from the South African government for a lack of transformation in its national teams, leading to a ban on bidding for international tournaments that will be reviewed next year.President Chris Nenzani said in a statement that the CSA will seek to move with the times and set a minimum number of black players to be selected in all their national teams. He added that these targets would be calculated over a year and not apply on a match-by-match basis.In the past we had never set targets in our national teams but with changing circumstances we feel it is essential to move with the times, Nenzani said.The precise targets will depend on work to be undertaken by relevant committees to determine what is realistic and sustainable. This will be announced in due course.The Proteas had already been seeking to introduce more black players into the national teams in all formats and have done so with some success. Chris Nenzani (right) wants South Africa to move with the times The one-day international side that defeated Australia by 47 runs in the tri-series competition in the West Indiies in June had eight players of colour for the first time ever.ddddddddddddCSA has already introduced quotas for the countrys domestic franchise competitions where teams must field at least six players of colour, including three black African players.South Africas sports minister Fikile Mbalula has been critical of what he says is the slow rate of transformation in the countrys major sporting codes, bar football. South African Sport Minister Fikile Mbalula The country has seen greater participation among black players across most sports at junior level despite the challenge of providing adequate school facilities in poorer districts.But Mbalula wants to see this reflected quicker at national team level and in April slammed the federations from rugby, cricket, netball and athletics for failing to meet what he says were agreed to targets on transformation.He banned them from bidding for or hosting international events until they met their targets, with a review of this decision scheduled for this coming April. Also See: Fixtures/results Live cricket on Sky Get Sky Sports Cricket videos ' ' '