Nico Rosberg concedes he lost his rhythm in qualifying for the Monaco GP, adding that it just "didn't work out."
The German had been vying for his third successive Monaco pole position but instead found himself behind team-mate Lewis Hamilton.
The World Champion set the pace on the first run in Q3 while Rosberg lined-up second. Hamilton then lowered the benchmark time on his second.
Rosberg, pushing hard to overhaul his team-mate and maintain his pole position run, locked up at Ste Devote and aborted his lap.
Finishing qualifying 0.342s slower than his team-mate, he will line up second on the grid for Sunday's 78-lap Monaco GP.
"Probably the opposite to Lewis as I had a good rhythm starting off in qualifying which I didn't have all weekend," Rosberg said. "And then I just lost touch towards the end.
"Of course, you know, going for it because I had to because you know Lewis is going to be quick."
"But," he added, "it didn't work out. That's it."
Asked if it had been a concern when Hamilton had been ahead of him after their first runs in Q3, something Rosberg achieved last year, the German said: "I didn't really see it as too much of a problem.
"It was very close and I was confident I could improve on my lap time.
"I changed the balance as in the first run I had too much understeer so I went up on the front flap.
"I was confident it would come my way but it didn't."