Helmut Marko felt no reason to give Nyck de Vries any more time to prove he could cut it in Formula 1.
The Dutch racer's time with AlphaTauri lasted for just 10 races before he was axed after the British Grand Prix. In his place, Daniel Ricciardo will make a return to the grid earlier than expected.
The decision was taken following a tyre test the Aussie took part in at Silverstone on Tuesday. Red Bull team principal Christian Horner was present and kept adviser Marko apprised of the 34-year-old's progress on-track.
