Lewis Hamilton has admitted Mercedes may not have fixed the fault that has caused his engine to break down twice in the opening four rounds of the season. Ahead of this weekends Spanish GP, Mercedes have described finding a solution to the MGU-H failures which affected Hamiltons car in qualifying in both China and Russia as their highest priority.However, the world champions have been unable to offer Hamilton any guarantees that the problem - described by team boss Toto Wolff as a freak occurrence - will not occur again. The team have explained the issues we have had and the efforts they have made to rectify them, Hamilton told Sky Sports F1. They arent rectified but they are in the process of being rectified. Hopefully this weekend they will be rectified but that might not be the case. Trailing Nico Rosberg by 43 points in the standings, Hamilton has described the deficit as a mountain but insisted he is relishing challenge of trying to catch his team-mate. It is what it is, theres no point being concerned, he said. I have less engines than Nico, so Ive just got to do what l can with what l have. For sure, I have a mountain to climb, but l love a challenge and I am excited about it.Who is under the most pressure this weekend in Spain?The world champion has also vowed he has no concerns about his Mercedes garage crew after the teams decision to swap personnel over the winter coincided with a series of mechanical malfunctions on his car. The issues we have had are nothing to do with the mechanics, said Hamilton. That is not a concern. I have 100 per cent belief in the guys and the team. I am just hoping l have had my share of bad luck.While Hamilton has bore the brunt of Mercedes reliability glitches so far in 2016, Rosberg has reeled off four successive victories to establish a commanding early lead in the Drivers Championship.But, despite his run of wins from the final races of last season now stretching to seven, the German remains unmoved in his belief that nothing is won yet. Ted Kravitz thinks Mercedes have to sort out their mechanical problems at the Spanish GP if Lewis Hamilton is to have any chance of winning the drivers championship Its not difficult to keep the feet on the ground, you just need to look at reality, he said. Lewis is still the same Lewis as the last two years. Hes still just as quick and just as difficult to beat. Thats it.Its a long, long way to go.It wouldnt be good for me to think seven months down the road. The best way for me to try and win Barcelona is to think about Barcelona. And thats my aim, to win Barcelona. Thats the way I like to approach it and its the best approach for me.Rosberg led large parts of the 2014 season before Hamilton eventually overhauled him, but his championship advantage never exceeded 29 points. This time his lead is nearly the equivalent of two race victories but Rosberg, runner-up to Hamilton in each of the last two years, denied suggestions 2016 now presented him with an opportunity of a lifetime to become world champion. Fernando Alonso and Lewis Hamilton react to the news of Daniil Kvyat and Max Verstappens swap Im 30 now and still a young F1 age Id like think, he said. So I dont think that way and have such thoughts.Im just in a great situation which Im enjoying. I have the opportunity to win races - winning is a massive thrill and thats what I race for. [I am] up against some awesome drivers. Up against Lewis and the red guys, Kimi [Raikkonen] and Vettel. Some great battles and it makes it all the more fun when I win races, especially in a straight battle.Watch the Spanish GP live on Sky Sports F1. The race starts at 1pm on Sunday, with build-up underway at 11.30am. Or watch the race without a contract for £6.99 on NOW TV. Also See: When is the Spanish GP on Sky? Whats different on the cars in Barca? Cheap New Orleans Saints Jerseys . -- Sergey Tolchinksy scored his second goal of the game 3:56 into overtime as the Sault Ste. Cheap Washington Redskins Jerseys . You can watch the game live on TSN at 7:30pm et/4:30pm pt. The Flyers had won seven of eight before dropping their last two outings on consecutive days over the weekend. Philadelphia was handed a 6-3 loss by the visiting Tampa Bay Lightning on Saturday afternoon before dropping a 4-1 decision to the Rangers the following night in New York City. https://www.cheapjerseys-wholesalechina.com/ .Y. - Rob Manfred was promoted Monday to Major League Baseballs chief operating officer, which may make him a candidate to succeed Bud Selig as commissioner. Cheap Dallas Cowboys Jerseys . -- Derrick Rose shook off poor shooting early to hit clutch shots late and Carlos Boozer had 20 points and 13 rebounds to lead the Chicago Bulls to a 104-95 preseason victory over the Oklahoma City Thunder on Wednesday night. Cheap Detroit Lions Jerseys . Philadelphia is 2-0 against the Senators this season and scored five goals in each victory. The Flyers recorded a 5-0 win in Ottawa on Nov. 12 and then earned a 5-2 home decision on Nov. 19. The Flyers have claimed three straight and four of the last five encounters with the Sens overall and Philly has won two in a row and three of its past four tests in Canadas capital city. Need to catch up with whats happening in the world of sports and pop culture? Dont worry, I got you.1. Well, college footballs opening weekend escalated quickly, right? We were gifted with a little bit of everything -- blowouts, comebacks and upsets. Just the way God and the college playoff committee intended.?2. Which game made you the most nervous over the weekend? For me, it was Texas?vs. Notre Dame. But in the end ... #hookem!?3.?The Florida State Seminoles had an impressive turnaround on Sunday night, which was led by redshirt freshman QB Deondre Francois. Should Noles fans be excited about what they witnessed??Or wait until Francois acquires a bit more experience before truly assessing his talents?4. Can the story about FSU wide receiver Travis Rudolph befriending Bo Paske, a middle school-age boy on the autism spectrum, get any better? Yes, it can.?5. Can you think of a more perfect way for Nebraska to honor late punter Sam Foltz? Three days after the tribute, and Im still incredibly moved by this heartwarming gesture.?6. Is Tebow-mania hitting ATL? Its been rumored that the Atlanta Braves have interest in signing former NFL player Tim Tebow, who hasnt played baseball since 2005, when he was a high school junior. So brace yourself for things to come.?7. Colin Kaepernicks peaceful protests are still making headlines. He gained the support of a few NFL players, USWNTs Megan Rapinoe and President Obama. With the NFL season kicking off this week, do you think a leaguewide sit-down (or kneel-down) during the national anthem is in the works?8. Given Kaepernicks stance, were you shocked to see the significant spike in his NFL jersey sales? I was.?9. Have you checked out The Undefeated recently? The breadth and depth of the sites Kaepernick coverage has been unmatched.?10.Why did writer and actress Lena Dunham apologize to New York Giants wide receiver Odell Beckham Jr.? In case you missed it...?11. Whoa, is it open season on OBJ? Washington Redskins cornerback Josh Norman cant seem to stop talking about the NY Giants player, either. If youre ready for them to settle their beef on the field, as I am, circle Sept.dddddddddddd 25 on your calendar. Thats when it all goes down.?12. The Minnesota Vikings traded away a first-round draft pick in 2017 and a fourth-round pick in 2018 to the Philadelphia Eagles in exchange for often-injured QB Sam Bradford. Bad idea?13. Team USA swimmer and gold medalist Katie Ledecky gave the Washington Redskins a pep talk this week. Will it help with their forthcoming season??14. Hope Solo believes her U.S. Soccer ban is payback for her stance on equal pay. Is Solo playing the victim, or does she have a point??15. Retired soccer player Lauren Holiday, who starred for the U.S. womens national team, is pregnant and battling an operable (and benign) brain tumor. Her husband, Jrue Holiday of the New Orleans Pelicans, announced hes taking time away from basketball to focus on his familys health. Can you imagine what they must be going through? Please direct all positive energy and prayers toward this family.?16.?WNBA player Tina Charles?and Team USA gymnasts Laurie Hernandez and Madison Kocian recently threw out the first pitches?at MLB games. Who did it best??17. Need a primer on the 2016 Rio Paralympics Games? Ive got you.18. Serena Williams just made history as the winningest Grand Slam tennis player in history, in terms of most matches won at Slams. Next, she continues her quest to surpass Steffi Graf -- each player has 22 Grand Slam titles. Will Serena do it at this years US Open??19. Nike recently labeled Williams the greatest athlete ever.?Would you dare dispute the athletic brands claim??20. Did you know that Ayesha Curry, the wife of NBA MVP Stephen Curry, not only cooks in the kitchen but also has skills on the court? Check her out!Shana Renee is the founder and editor-in-chief of?All Sports Everything and a passionate New York Jets, Knicks and Yankees fan. Follow her sports talk on Twitter at?@ItsShanaRenee. ' ' '