Medvedev upsets top seed Djokovic in three sets at Monte-Carlo quarter-finals.World number one Novak Djokovic suffered a shock defeat at the hands of Russia's Daniil Medvedev in the quarter-finals of the ATP Monte Carlo Masters. Medvedev won 6-3, 4-6, 6-2 in two hours and 20 minutes to book a semi-final spot against Djokovic's Serbian compatriot Dusan Lajovic.It's the third relatively early exit for Djokovic recently, following his third round defeat at Indian Wells and a fourth round loss in Miami last month.