With Daniel Ricciardo now safely at Red Bull for 2014, the Australian's move has opened up a seat at the energy drink company's second team, Toro Rosso.
Until very recently, the obvious favourite was Portuguese Antonio Felix da Costa, the latest cream of Red Bull's junior programme.
But we reported last week that the 21-year-old has actually struggled recently in the Formula Renault 3.5 series.
And the next Red Bull youngster in the queue, Carlos Sainz jr - the 18-year-old son of the Spanish rally legend - has already been ruled out by Toro Rosso boss Franz Tost.
"I assume that he could be at formula one maturity in about two or three years," Tost said in July.
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