<text>  Jenson Button fears McLaren will qualify at the very back of the grid for Sundays Australian Grand Prix. The British driver and his team-mate Kevin Magnussen, who is deputising for the injured Fernando Alonso, endured a miserable day during practice for the season opener at the Albert Park Circuit. The McLaren pair, hampered by reliability problems to their new Honda engine, managed only 13 laps between them in Fridays opening session and were five seconds down on Nico Rosbergs best time for Mercedes. Jenson Button cut a frustrated figure in Melbourne on Friday as McLaren struggled for pace and reliability . Button was almost four seconds slower than Nico Rosberg, who set the pace for Mercedes on Friday . And while Button managed to get more running under his belt during the second session, completing 21 laps, he was still almost four seconds down on the front-running Mercedes. Magnussen posted four laps before losing control of his McLaren at Turn Six and crashing into the barriers. Backmarkers Manor, who didnt compete at any of the winter tests, failed to take to the track on Friday, and Button fears a similar no-show tomorrow will see McLaren bring up the rear for Sundays curtain raiser in Melbourne. Kevin Magnussen loses control of his McLaren at Turn Six and runs into the gravel before crashing out . The Dane didnt take any further part in the session with his car in bits before it was taken back to the garage . I am hoping it wont be the last row of the grid, said Button, a three-time winner in Melbourne, when asked about his hopes for qualifying. Hopefully 20 cars will run. It wont be easy and we all know it. We are working as one and we are not pointing any fingers. We are just solving the problems as we go. Hopefully we will be competitive sooner rather than later. McLaren, powered by Honda for the first time since 1992, had a pre-season to forget as they struggled for pace and reliability. And getting to the chequerd flag on Sunday will now be considered a positive result for a team which hasnt tasted victory in over two years. I have no goals in terms of position, said Button. The important thing is to make sure we maximise everything we have and then look at timesheets in qualifying and the race, see how we fared, and how much work we have to do. McLaren are powered by Honda this year, but face an uphill struggle and may bring up the rear in Melbourne . 