Mumbai, May 3 -- "You can imagine," Novak Djokovic said, resting back on his chair moments after losing his Madrid opener and days before his Rome withdrawal, "20 years I didn't experience what I'm experiencing in the last 12 months. Early exits, and way too many." Over those 20 years, Djokovic surged to levels that were so unshakably consistent that it personified mechanical excellence. Across the last 12 months, there were evident signs of slide and rust. In the last month, it has been on an alarming free-fall. Last year, the Paris Olympics gold medallist was struggling to win titles. This year, the 24-time Grand Slam champion is struggling to win matches. Djokovic is set to head to Roland Garros later this month having not won a match on...