Daniel Ricciardo has admitted that Red Bull need more time after the team endured another difficult day of pre-season testing.
Ricciardo was sidelined for much of the morning due to a software issue with the RB10 and the team then discovered another mechanical problem after a brief run.
Further investigation revealed more damage to the car and Red Bull was unable to repair the car in time.
"In all honesty it wasn't a great day today," said Ricciardo, who eventually completed 15 laps
"I guess we still need more time. We have four more days coming up and hopefully we can maximise those."
"I have to say that on the run we did today the car did feel better. But unfortunately another problem arose and we couldn't exploit that potential."
"I hope we can do more running next week. I'm happy I'm doing the first two days. At this stage we just need laps and I'm just hanging to get back in the car."