But, after the conclusion of FP1, Horner stirred the pot himself by suggesting that Red Bull will have an announcement of their own to make in the midst of the McLaren-Honda divorce and switch to Renault engines.
Horner also insisted that Carlos Sainz is still very much part of Red Bull's plans, despite his seemingly imminent move to Renault.
"We just want to be in a competitive position so I think these hybrid regulations have been quite frustrating in many, many respects", Horner said. Red Bull themselves wanted to find another engine supplier, but could come to terms with any other company. The deal is said to be confirmed during the Singapore Grand Prix.
But the tension has returned, even with Ricciardo's win in Azerbaijan, as it did not help things in the long run. Instead, McLaren will reportedly be using Renault power units at the start of the next season with the McLaren-Renault deal lasting until 2020.
Earlier this week, it was reported that McLaren and Honda will be parting ways at the end of the current season of Formula 1.
Ricciardo, whose Red Bull contract ends after next season, fired a warning shot when he said he needed to be convinced he could win a world title with the team.
Ricciardo is understandably nervous about the merger as Honda engines are regarded as "the worst on the track", according to The Times. While that stoked fears that Red Bull might be saddled with Honda as their only engine option, Red Bull hinted to Sky Sports that they have "existing relationship" with a motor manufacturer who can hook them up in Renault's place for 2019 that sounds a lot like Aston Martin. Join the Beyond the Flag team!