Lewis Hamilton has warned that speed alone will not be enough to win F1's 2018 titles - which may be good news for Mercedes if Ferrari maintain their pace advantage when the season resumes.

Hamilton's unexpected back-to-back victories in Germany and Hungary mean it is the Mercedes driver and not previous leader Sebastian Vettel who sits atop the world championship as the sport breaks for summer, despite most observers now accepting that Ferrari hold a car advantage.

Mercedes remain adamant that Ferrari have a faster car and they have to respond when the season restarts in Belgium in late August, but Hamilton has also stressed the importance of continuing to make the most of opportunities and executing race weekends without mistakes.

"This year we all know that Ferrari really do have the upper hand pace-wise," said Hamilton. "But I think all around, performance-wise, in terms of strategy...to win a championship is not just about speed, it's about how you manage things, the strategy calls you make, mistakes, all these different things all weigh up.