@Meles, I don't get it. You are enthusiastic about all next Gen players, why not Shapo? This flies in the face of reason, surely?
I love the Shapo serve game and have posted on its statistical significance. I'm waiting and seeing on his return game and now apparently his backhand. I go by stats and we really don't have enough matches to really determine even a baseline for his return game. His return game could end up being worse than Roddick.
I'm also deeply suspicious of the efficacy of an all court game these days. Federer is like the last of the jedi knights when it comes to this style of play. Young Shapo and Tsitsipas show hope of carrying the flame, but it seems an impossible task. Perhaps with Australian Open swing largely a success with fast courts plus expanded grass season will help these players, but its not going to be easy.
So I'll trumpet the greatness of Shapo like I've done on serve, but really with any player they have to have the stats. Pouille didn't have them and sure enough after back to back slam QFs he's fallen back to top 20 status. Fritz was an eye test that's gone awry for now. Also had my early Chung and Rublev periods that fizzled until the last six months or so.
I go by the numbers which is why I trumpeted Thiem and then Zverev on the eve of his Rome triumph when I realized what was a foot. Chung and Rublev got back on the radar with their return games in my analysis of the Milan field. Khachanov just won, but deeply skeptical of him doing any more than flirting with the top ten in a couple years. Medvedev is another member of the NextGen C team in my book and another tournament winner in 2018 who could make the top 10 if his serve game improved nicely over the next few years. Khach and Med have determination which may get them to overachieve a bit.
The eye test is troublesome, but already my beady eyes have their gaze upon Tiafoe and Jarry on clay.
Another guideline I'll use is player size and weight. Short generally is a problem, but Schwartzman is really making waves these days. Being tall and heavy (Raonic) is not a good combination. No matter how athletic and Raonic is very athletic, these players just can't change direction and move well. Generally results fade for many after age 25 or so. And despite some success, tall ones like Delpo, Cilic, Soderling, and Bendych just not really top tier material. Zverev and Jarry are quite light for their height and so it will be interesting to see how they push the envelope.
For those who don't know Jarry, he's a young 22 year-old from Chile with a complete clay court game that stands 6' 6". This isn't some hard court baseliner taking to clay like a Soderling; Jarry has got all the attributes of a clay court player plus saw 228 kph serve with bizarre beginner serve position. Another power clay courter and one of my favorite types of tennis players since Magnus Norman.
http://www.**************.org/imgb/56584/atp-rio-schwartzman-and-jarry-reach-qf-on-a-raindelayed-day.jpg