Mercedes may have claimed a double podium in Bahrain but Toto Wolff breathed a sigh of relief as his drivers finished as both suffered brake problems.
Lewis Hamilton, who won the grand prix ahead of Kimi Raikkonen, was urged to be cautious when applying his brakes as he came to complete the 57-lap race.
However, he wasn't the only Mercedes driver in trouble.
Nico Rosberg lost second place to Raikkonen when he ran wide on the penultimate lap, a mistake he put down to his brakes.
"It was a huge relief as both cars lost brake power," revealed Mercedes motorsport boss Wolff.
"It was a shame for Nico he was having a great race and did some great overtaking.
"We need to analyse the overheating problem."
As for the race result, Mercedes may have achieved a double podium but they had a tough fight on their hands with Ferrari.
Rosberg first had to battle Sebastian Vettel before Raikkonen got involved in the mix.
Wolff added: "Looking at the result we were not dominant and Ferrari are catching up.
"We need to do everything we can to continue to beat them."