A strong opening stint propelled Lewis into a comfortable advantage and he was able to manage the race from there, taking a commanding win.
Valtteri fell behind Sebastian Vettel at the start but jumped to P2 after Ferrari opted to pit under the Virtual Safety Car. Valtteri didn't and while such a long stint on Mediums was a risk, it paid off.
"Lewis did a fantastic job: a great start, impressive pace in the opening stint and perfect management of the Medium tyre," Toto said.
"For Valtteri, we tried to overcut in the first stint and just missed out on passing Vettel. Then when Sebastian took the chance to pit again under the VSC, we decided to do the opposite and take the Medium tyre to the finish.
"That involved running the tyre a long way, a little bit into the unknown with over 45 laps to do on it, and we had our hearts in our mouths in the final laps as there were some vibrations on the front axle as well.
"Valtteri did the perfect job to manage the load on the left front and the falling tyre temperatures on old tyres, and sealed a really special 1-2 finish."