I've only seen one match on his but it seems some people are already comparing the two guys. His game seemed unotodhox at the time but I don't rememeber thinking about its resemblance to Ríos game. I'll try to see Murray-Dolgo match to make my own judgment.
In any case, his game seems to be inspired by Ríos:
Favorite Players To Watch: “Well, it used to be Marcelo Rios. He was really fun to watch. He was really improvising on the court. Now, I don’t know, tennis has gotten more monotone and everything. Running and physical. Because everyone is hitting so fast, you can’t really play that style. I mean, Roger’s got some of that still in him. He still does that playing style – volleys and drop shots, slices. I like to watch his game the most probably. (Did you meet Rios?) I met him when I was small. Not really in person, that I remember. The second time my father was with Medvedev was in 1998, that time when Rios won in a row Indian Wells and Miami. I was at the tournaments and I was always killing my parents to go to the matches. He was always playing night matches and I was, Let’s go watch him. Let’s go watch him [smiles]. I really like to watch his matches. I was crazy about him that time. The style of his game was incredible. He could pull out any of the shots in any moment. It was really fun. You don’t know what the guy can do. He wasn’t playing the same game all the time. He was really variative, tough to play, I think.”
Also an interesting passing comment about how tennis has gotten more monotone in this era.