Daniel Ricciardo says he and Red Bull must work out why he lacked pace compared to team-mate Max Verstappen at the Austrian Grand Prix.
Ricciardo started ahead of Verstappen but was overhauled by his team-mate, who went on to finish on the podium, while the Australian swatted away a threat from McLaren's Jenson Button to take fifth.
"I think for the team it was a really good day," he said.
"We didn’t expect to be on the podium here in Austria. Obviously I wish I was up there with Max, but from my side the race was a bit disappointing.
"At the beginning we seemed to get passed before Turn 8 which is not normal, so that was a bit frustrating but then once it settled we just weren’t quick.
"I was obviously trying to push on the tyre and then get what I could out of it. It seemed we could hold the pace, but then when everyone was improving and getting quicker and quicker we were just getting slower and slower.
"For now I just want to understand why and look into it. If there are things I need to do better, then I will make sure to figure that out."