Fernando Alonso now has a solid upper-hand over his Ferrari teammate, according to Nick Heidfeld.
The gap between the pair on the Barcelona grid is six tenths and five grid positions, meaning that Massa has only outqualified Alonso once in 2010.
"Already at the last race it was clear that Fernando is consistently faster," Mercedes reserve driver and grand prix veteran Heidfeld told Autoblog UK on Saturday.
Ferrari fined $20,000 for Alonso-Rosberg near-miss
Stewards fined Ferrari $20,000 after investigating the pitlane incident during qualifying involving Fernando Alonso and Nico Rosberg.
The pair almost collided in Q3 when Ferrari's Alonso exited the garage into the path of Mercedes' Rosberg, who had to take avoiding action and nearly struck the pitwall.
A stewards' statement confirmed that the Maranello team was guilty of an "unsafe release", and referred to the rule requiring "all pitlane and track and safety measures to apply to all practice sessions as for the race".