Mercedes team principal Toto Wolff has questioned the priorities of "certain members of the Ferrari team" after it registered its worse qualifying performance of the season at the Belgian Grand Prix.
Ferrari qualified 13th and 14th at Spa-Francorchamps on Saturday, 1.7s off the pace of Mercedes' Lewis Hamilton on pole position. At the same circuit last year, both Ferraris were on the front row of the grid and Charles Leclerc won the race.
Ferrari was Mercedes' closest rivals for the title last year, but experienced a loss of performance over the winter after an FIA investigation into its power unit led to a private settlement with the team.