He beat Djokovic at Monte Carlo 2019 and had decent results that year apart from RG where he's been shocking losing in the first round every year. Easier just to copy/paste from Wiki but his results were decent besides the obviously way more important RG so plenty of improving to do. Still, here's a paragraph showing his good results on clay in 2019.
Medvedev entered the
2019 Monte Carlo Masters having only won two of his first 13 career matches on
clay courts. Despite this, Medvedev reached his first ever Masters 1000 quarterfinal at the tournament after defeating world number 8
Stefanos Tsitsipas in the third round.
[20] In the quarterfinals, Medvedev earned his first triumph over a
world number 1 ranked player, when he defeated Djokovic in three sets.
[21] His run ended in the semifinals against
Dušan Lajović in straight sets.
[22] The following week at the
Barcelona Open, Medvedev earned his third successive top 10 victory (this time over Nishikori) to reach his first ATP Tour final on clay.
[23] In the final, Medvedev was defeated by world number 5
Dominic Thiem in straight sets.
[24]