Max Verstappen has explained that power outages were to blame for his inability to get closer to Ferrari and Mercedes in Friday practice for the Bahrain Grand Prix. Verstappen was sixth-fastest in the representative FP2 session, behind the Renault of Nico Hulkenberg.
Renault-powered cars looked rapid through the speed trap, with McLaren also clocking leading speeds.
Comparisons between Renault and Red Bull carry more significance in 2019 after their split at the end of last year.
However, Verstappen played down the notion of the French marque having closed the gap, explaining that he was not at his best in practice.
"We still didn't find the right set-up," he said.
"We knew that Ferrari was going to be quick and they are. We still have some work to do, especially on the softest tyres.