"Probably the biggest achievement in my career" - Djokovic on weeks at No.1 record

Novak Djokovic described his record breaking achievement of spending the most weeks as world number one as 'probably his biggest achievement in his career' ahead of the Monte-Carlo Masters on Sunday.

The 33-year-old broke the record after he overtook Roger Federer's of 310 weeks in March, and has extended that to 316 since.

The eighteen-time Grand Slam winner was speaking ahead of competing at his first tournament since winning his ninth Australian Open title in February.

The Serbian will begin his clay-court season in Monaco at a tournament he has one twice, his last triumph coming in 2015 with victory over now-retired Tomas Berdych in the final.