Red Bull driver Daniel Ricciardo believes he faces a challenge to reach the final segment of qualifying after Friday's pair of practice sessions at Sakhir.
Ricciardo, who finished in fourth place in Australia, placed ninth in the second session in Bahrain.
A repeat result on Saturday would leave Ricciardo eliminated in Q2, under the revised qualifying format of eight Q3 contenders.
"This morning wasn’t too bad but from the very first lap this afternoon I locked the front into Turn 1 which killed that set of tyres," he rued.
"We couldn’t use that set for the long run which compromised our afternoon programme.
"With the Super Softs on the low fuel we still needed to find a bit more balance, and with the high fuel run, we were interrupted with the virtual safety cars.
"We still have some homework to do but we’ll see how tomorrow goes. I think Q3 will be on the edge for us, but the race will be better."