Nico Rosberg admitted he had no explanation as to why he was unable to be a threat to Lewis Hamilton in qualifying for the Hungarian Grand Prix.
The German driver saw Mercedes teammate Hamilton top all practice sessions before securing a dominant ninth pole position of the year, and the fifth of his career in Hungary.
Hamilton finished the grid-deciding session over half a second in front of Rosberg on one of the shortest circuits of the calendar.
Rosberg conceded he had no answers.
"I don't have an explanation," said Rosberg. "Qualifying went pretty much to plan but I didn't find the pace.
"It has been a bit up and down all weekend for some reason. We need to look into it tonight.
"I am definitely not happy with how it went today."
Rosberg, starting from the dirty side of the grid, says he is pinning his hopes of beating Hamilton on the strategy.
"There's going to be some opportunities in terms of strategy, definitely, so let's see," said.