Red Bull frustrated with Renault

Red Bull are frustrated by Renault's decision to not provide all of the new power unit elements for Daniel Ricciardo at Hockenheim.

Renault only provided Red Bull with three of the potential six new examples for Daniel Ricciardo's car.

Ricciardo suffered a failure in the race and was then forced to retire for the second time in three races.

There is clearly still tension between Renault and Red Bull since the latter announced the split from their relationship for next season as they move on to Honda's power unit.

Red Bull had chosen Hockenheim for a power unit change, as they wanted to compromise the race, so they could focus on a more likely winnable Hungaroring circuit coming up this weekend.

Ricciardo started from the back of the grid due to this sacrifice and took a new MGU-K, energy store and control electronics, but it was expected he would also take a new V6, turbo and MGU-H, but they were not provided to Red Bull.

Whatever failed for Ricciardo is not being disclosed to the public, perhaps in an attempt to not add more fuel to the already boiling fire.

"First we need to understand what happened," Renault boss Cyril Abiteboul told Motorsport.com.

"There was no reason to change the ICE, at the time. It's always the same thing, in hindsight, after the race, you can always reinvent the world and re-do scenarios, but it's like strategy, wet and dry, it's like lots of things.

"But at the time, when we had to make a decision, with the information we had at the time, there was absolutely no reason. Engine failure can happen at any time, even with a new engine, unfortunately, it can happen, as happened in the past.

"There was no more certainty with a new engine than an old engine, so I think we need to first find out what happened before drawing any conclusions."