Djokovic knocked out as 'lucky' Nadal battles on in Monte Carlo

Novak Djokovic's bumpy Masters run this season continued in Monte Carlo. [AFP]

World number one Novak Djokovic was dumped out by Daniil Medvedev while Rafael Nadal survived a struggle to reach the semi-finals of the Monte Carlo Masters for the 14th time on Friday.

Djokovic, twice a champion in the principality, lost serve five times in a 6-3, 4-6, 6-2 defeat by Russia's 10th seed Medvedev.