Hockenheim, July 26: Lewis Hamilton fears that a prolongation of Europe's record-breaking heatwave could upset Mercedes bid for glory at their home German Grand Prix this weekend. The defending five-time world champion, and current series leader, told reporters Thursday that he was hoping for rain and admitted that if the sweltering conditions continued Mercedes would be in trouble. "I'd imagine, if it stays this hot, we're going to be in trouble," said Hamilton. "We've got these hot races coming up, which are obviously not so easy for us so it's going to be a challenge.

"It's definitely a good thing if it rains! There's not really much we can do (about cooling problems) as it's a much bigger design issue that we have when it gets hot, so it's not so easy to change... Hopefully this weekend will be ok.”" Hamilton enjoyed a famous victory in last year's race when he won from 14th on the grid after title rival Sebastian Vettel crashed out of contention while leading in heavy rain. Lewis Hamilton’s Mercedes Team Sends His Formula One Car To A 5-Year-Old Cancer Stricken Boy.

But he struggled home fifth, with team-mate Valtteri Bottas third, in high temperatures at the Austrian Grand Prix last month when Mercedes were defeated for the first time this year. Local weather reports recorded 40 degrees Celsius in the Hockenheim paddock on Thursday. "Clearly it (cooling) is a big weakness in our package," said Bottas.

"We have a new upgrade for the cooling systems so that should be more efficient -- and should give hopefully quite a few degrees of margin, but I'm not sure anyone expected to be racing in 40 degrees." Bottas is 39 points behind Hamilton in the championship following the Briton's home win at Silverstone two weeks ago, his seventh victory in 10 outings this year. That spell of form has delivered his best start to a season.

- Seven wins in 10 -

"I was just reminiscing about my McLaren days and I think the most I had in a year was five wins," said Hamilton. "Over all the years, I think we've maybe had 10 in a season, but never seven in the first 10 so it is definitely an outlier and something we are proud of." Hamilton is the first driver since Michael Schumacher in 2004 to win so many of the opening 10 Grands Prix.

Schumacher ended that 18-race season with a record 13 wins, a target for the Englishman in the remaining 11 races. He added that he would work on improving his qualifying as he seeks to add to his record 86 career poles. "There are always things you can learn from these races, even though the last one was pretty strong, but there are still areas that can be better," he said.

"For example, qualifying is still not perfect yet. So I've got to work on that, but in general the race pace has been really strong." Hamilton added that he also expects to see Ferrari and Red Bull improve their pace and said he welcomed the prospect. "I hope it gets closer through the year," he said.

Ferrari's Sebastian Vettel, however, believes Mercedes remain "big favourites" to win his home race this weekend as he struggles for form. On the eve of the race staged closest to his childhood home, the four-time world champion -– who is without a win since last August -– said he hoped to be competitive, but realistically felt Ferrari could not halt the Silver Arrows.

"Obviously I want to win, but I'm realistic," he said. "Coming here I don't feel we are the favourites, but I do feel we have a chance." Ferrari team-mate Charles Leclerc, who is only three points behind Vettel in the title race, said he was still the junior in the team and learning from the German driver. "As I have said before, I am still very early in my career and I am sure there is a lot more I can learn and a lot for I can do better," he said. "So I will focus on these things."

(The above story first appeared on LatestLY on Jul 26, 2019 12:07 AM IST. For more news and updates on politics, world, sports, entertainment and lifestyle, log on to our website latestly.com).