Mercedes driver Nico Rosberg captured pole for the 2016 Chinese Grand Prix, while team mate Lewis Hamilton hit unreliability problems and will start from last.
Hamilton failed to set a time during Q1 as Mercedes battled ERS troubles on his hybrid power unit that left him down on power.
Hamilton was already set to take a five-place grid penalty for changing his gearbox, but now has a massive task on Sunday starting from 22nd.
Mercedes team boss Toto Wolff, who admits Mercedes still haven’t been able to fix Hamilton’s issues.
“No, we don’t know the problem yet,” Wolff tells Sky F1. “It’s on the system – we need to find the root cause to work out what we need to change.
“Ferrari are a threat because the long runs are very good. We are taking them very seriously.”
Hamilton told Sky Sports F1, just following the qualifying Q1 – “These things are sent to try us and I am sure we will learn from it, It is just about trying to figure out the issue and making sure it doesn’t happen again.
“The car is quick, hopefully they get the issue fixed and we can have a race tomorrow.”