Novak Djokovic can be advised to follow MS Dhoni’s IPL season. If the Serb finds cricket boring, he can just watch his four-ball inning – calling it a painful-to-watch outing would be more apt – against Punjab Kings in CSK’s last game. Dhoni, 43, has looked in shape, sufficiently beefed up. But he couldn’t middle many balls. When he did, he failed to clear the ropes, like he did once upon a time. CSK’s fortunes would get impacted. The IPL final is still about a month away but the multiple champions are out of contention. Dhoni failed when his team wanted him to succeed the most. And in his and CSK’s failure, is a lesson for Djokovic – Form wasn’t on tap, it doesn’t flow by just turning the knob. Few days back, towards the end of last month, Djokovic, 37, had lost to World No.44 Matteo Arnaldi in straight sets. It was a meek surrender. Acknowledging his fall but not sure if it was time to call it quits, Djokovic spoke about a “new …