Why Mercedes feels its rapid F1 progress is still not good enough

After rival Aston Martin emerged as Red Bull’s main threat in the Bahrain and Saudi Arabian Grands Prix, it was Mercedes that took the challenge to F1’s current pacesetter in Melbourne. 

George Russell secured a spot on the front row and led the early stages ahead of the first safety car period, while Lewis Hamilton then briefly took over at the front before Max Verstappen blasted past on his way to victory. 

But while Red Bull remains a clear step in front…