Daniel Ricciardo says a problem with his visor held him back at the Brazilian Grand Prix, where he finished a disappointing eighth position in extreme wet conditions.
While teammate Max Verstappen stole the plaudits with his impressive drive to third, Ricciardo struggled and was one of the teenager's victims as he scythed through the field late on. Ricciardo, who also had to contend with a five-second penalty for entering the pit lane when it was closed during a safety car spell, also fell victim to Red Bull's strategy mistake forcing a switch back to wet tyres late in the race.
Ricciardo has revealed his visor kept fogging up, preventing him from driving on the limit and utilising the potential of the car.
"It was a frustrating race, we never really felt like we got lucky with the strategy; every time we made a change with the tyres there was a safety car or a red flag," he said. "We lost positions and obviously we could not predict what was going to happen and we felt a little bit on the back foot.
"But the real difficulty today was my visibility, which was a struggle as my visor kept fogging up. I kept opening my visor and trying to wipe it but it's never happened before, and it held me back. It's a shame as the car was a lot better than eighth, when we had a clear track our speed was good."
Team boss Christian Horner confirmed the team will look into what caused the issue.
"The rain was not running properly down the visor, and then it started to fog, and so he was struggling for visibility out there," Horner said. "When visibility was as it was, he said he didn't see Max until he was ahead of him [during the overtake]. Obviously an issue to understand what happened."