Lewis Hamilton started on pole position for the Spanish Grand Prix on Sunday in Barcelona with his Mercedes team-mate Nico Rosberg next to him on the grid.
The Englishman got off to a terrific start opening up a 1.1 second lead to Rosberg in second after just one lap.
Meanwhile, Williams' Valtteri Bottas slipped past Daniel Ricciardo into third and Romain Grosjean managed to defend his fifth place despite a massive lock up on the grid.
Lotus' Pastor Maldonado had some trouble on Lap Three when he made contact with the Caterham of Marcus Ericsson but both cars continued to race, though the Venezuelan was eventually given a five-second penalty for causing the problem.
It was as clear as ever that the Mercedes car is in a different lead to the rest of the field as their two drivers opened up a huge gap to the rest of the cars very early on in the race, 12.9 seconds clear after Lap 10.
Reigning World Champion Sebastian Vettel pitted early in the race having started from 15th on the grid, making his first stop on Lap 13.
Hamilton managed to keep the lead from Rosberg, but only just, and he had a slow pit stop on Lap 19 which gave Rosberg an opportunity but the Brit managed to regain the lead when the German pitted on Lap 22.
The two Mercedes cars split their strategies with Rosberg going on to the hard tyres as opposed to the medium compound that went on Hamilton's car.
Jean-Eric Vergne's disastrous season continued as he was forced to retire for a third time. Ricciardo continued in third while the two Mercedes were battling it out for first spot.
Kamui Kobayashi was the second and final retirement of the race when he was forced out courtesy of a front-left brake failure on his Caterham.
Hamilton had another slow stop when he went into the pits in Lap 43 but he managed to to regain the lead once again when Rosberg two laps later.
Vettel had an absolutely stunning race as he came through the field with some fantastic overtaking, moving up to fourth place from his lowly starting spot.
It looked as though Rosberg had the upper hand in the battle for victory as the two team-mates battled it out, but Hamilton managed to hold him off.
Hamilton took a fourth race victory in a row and Mercedes completed a quartet of consecutive one-twos while Australian rookie Ricciardo finished on the podium for the first time, once again beating his co-driver in the Red Bull car.
Another hugely dominant display from Mercedes, there is seemingly no catching them this season. And for Hamilton, he put in a brilliant defensive display to hold off Rosberg once again.
Next up is the famous race in Monaco and Rosberg will be looking to take victory to try and retake the Championship lead which is now held by Hamilton thanks to his Barcelona win.