Fernando Alonso is raring to go after missing the Australian GP, but the double World Champion admits McLaren are likely to be in for another tough weekend in Malaysia.
Having suffered a concussion during the second pre-season test in Barcelona, the Spaniard was advised by doctors to skip the season opener in Melbourne a fortnight ago.
He underwent a series of tests last week and was given the green light to race at Sepang, but he still needs to be cleared by the FIA medical delegate before he can take part in the grand prix.
"I’ve been working hard on my fitness and I feel good and ready to go this weekend," Alonso said. "The heat in Malaysia is always very tough for the drivers but I’ve been focusing on this in my training and I’m definitely prepared for all of the weather conditions that we can face in Sepang. This track has always been one of my favourites, it’s a really exciting circuit to drive and there’s the opportunity for good overtaking battles between the straights and the fast corners.
"I’ve won three times in Malaysia, including in 2007 with McLaren, and although we are a long way from the front, everyone in McLaren-Honda is working hard to develop the package and keep building momentum with each race."
McLaren have endured a nightmare 2015 so far with Jenson Button the only driver not to score points in Australia as he finished 11th, and Alonso admits it's unlikely to get any easier for the team in Malaysia.
"The weekend will be tough, but I’m looking forward to getting into the MP4-30 for the first time in a Grand Prix and getting back to racing," he said.
"I’ve spent some time in the simulator back at the factory with the team, and my focus will be on continuing the development of our package with my engineers, and working on our balance and race set-up. There’s a lot of potential in the car and we will keep pushing every race until we see results."