The Serbian has been on a winning tear since the indoor season, picking up titles at the Paris Masters, the ATP World Tour Finals, the Australian Open, Indian Wells and Miami.
"I’m at the peak of my abilities right now," he said in Monte Carlo. "I’m enjoying my time on the court, playing some of my best tennis."
The top seven leaders for weeks at No. 1 are:
1. Roger Federer - 302
2. Pete Sampras - 286
3. Ivan Lendl - 270
4. Jimmy Connors - 268
5. John McEnroe - 170
6. Novak Djokovic - 142
7. Rafael Nadal - 141
With a 4,310 point lead on world No. 2 Roger Federer, Djokovic's total weeks at No. 1 are likely to increase substantially during the season, putting him within reach of the fifth position.