Djokovic's problems were caused by the changed service action which Todd Martin wanted him to use. It caused more double faults and a loss of confidence in his game.
Djokovic started playing better once he got the service motion back to normal.
I still maintain that Nole should sue Todd Martin for negligence and loss of earnings over that period.
Correct. The commentators were talking about it at the AO - Todd Martin was instrumental in getting Novak to change his service motion. The result? Number of double faults rose to equal number of balls in.
Conspiracy theory - the moment I heard Martin was coaching Novak my first thought was - Martin will find a way to slow Novak down by screwing him up. Novak was too much of a threat to the Royal #1 & 2.
For awhile it looked like Novak's long time coach Marian Vajda was being forced out. Now that Vajda is back as number one coach - Novak is winning again.