Such is Mercedes' advantage out on track that Christian Horner says it is "possible" for the Brackley team to whitewash the season.
Lewis Hamilton and Nico Rosberg have been in complete control this season, winning all five of the opening races.
Claiming a fourth 1-2 of the Championship in Spain on Sunday, Mercedes extended their lead in the Constructors' Championship to 113 points over Red Bull.
Red Bull drivers Daniel Ricciardo and Sebastian Vettel were third and fourth on the day, 48 and 76 seconds down the road respectively.
And although Horner reckons Ricciardo's deficit to the Mercedes drivers was not an accurate picture, he acknowledges the Brackley team's advantage....
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