Denis, who is being trained by his mother Klaudiya Istomina, possess quite solid and efficient stroke technique and his service fulfills all the requirements of the Service 3.0, which stands for service played with optimal body energy integration. Some details of his service can be seen on photos from the 2016 US.Open shown below:
Genie's service, in particular, didn't get so much attention yet, but despite some improvement possibilities concerning mainly the increase of its margin, it has a lot of good aspects, mainly around the body energy integration into the stroke. Genie mostly gains quite high percentages out of her serving points.
Tall Garbine (182 cm / 6'0'') can consider her serve as one of her weapons. The photos from her practice during the 2015 US.Open show that Garbine well fulfills the requirements of the Service 3.0.
Here the distinction between her typical first service (usually more or less direct with just a slight topspin) and her famous kick service (heavy topspin with some sidespin used mostly as a second service) are quite visible. In both varieties, Samantha spends almost the entire stroke energy on the dominant (right, in her case as a right-handed player) side. The "follow through 1" (= the active part of the follow through) of the kick/topspin serve then goes, besides other differences to the first service, much more to the right.
Naomi correctly fulfills all the essential Service 3.0 (of Tennis 3.0) requirements. Certain distinct improvements bringing higher margin and better efficiency would be still possible though. Some of the main aspects to work on are mainly around the rather arm-power forced pronation, which is quite normal when proper pronation was introduced to the player later in the career but should still become a bit more fluid (with better contraction-relaxation coordination) over the time to make an optimal....
Ying-Ying Duan (*89 / CHN) can be at her age of 27 years hardly considered as a young tennis prodigy, but this relatively new entrant into the WTA top 100 could eventually become a factor in the women's tennis. At her height of 186cm (6'1''), the service can be considered as her biggest weapon. Her service surely has already quite some potential, but certain improvements could bring even better serving efficiency and higher margin along.
From the point of the technique, Karolina has some excellent aspects of the Service 3.0 going most probably back to her early technical development stage in her junior years and also one little weakness leading to a lower margin at decisive (tense) moments like during her recent US.Open finals. Some of the main elements can be seen below..
Rebeka Masarova (*1999 / SUI) with her WTA ranking of #314 (as of July 18, 2016) is currently the world highest ranked player before reaching the 17th birthday. Rebeka, who won the 2016 French Open junior event a few weeks ago, considers service as her favorite stroke. She has Slovak and Spanish roots and is currently being coached by her mother. As all very successful Swiss female tennis players of the past over 20 years, Rebeka was developed largely privately outside of the regular Swiss Tennis Association program!
TENNIS 3.0 CODE has few respective requirements for each of the strokes of tennis. But there is the one main element of the TENNIS 3.0 CODE, which is common to all dynamic TENNIS 3.0 strokes being hit with the optimal combination of power and control (with the exception of some trouble-shooting and trick strokes), which we want to reveal to the tennis world - the common denominator of all high-quality dynamic TENNIS 3.0 strokes is in the effort to move...
The principles of TENNIS 3.0, meaning the dominance of the body action in the strokes, can be applied practically for everybody at every age and level. Here featured senior player Jörg (65+ / SUI) is a life-long athlete, but late tennis starter. He was still able to learn in his sessions with the MBTA practically perfect serving motion where he generates the power of the ground and dominates the service by the energy from the body, which is being channeled into full upper-limb targeted pronation