in my club, there are a certain number of players who are convinced that they have the truth, who also talk about preferring to play with poly, even if it means injuring themselves, and very often, these are players who have never really injured themselves, who play up to 3-4 times a week, have a rating between 5.5 and 4.5, have questionable spin technique, and are convinced that poly is doing most of the work.
I have been fighting for years to change my mind, but without great results, the marketing, the ego of the players to want to play as top 100 ATP when they are just good club players, the incompetence of the sellers make beliefs die hard!
finally, for a few months (a year and a half to tell the truth), some "good" players who are used to playing with the rigid racket setup (pure drive, yonex ezone, head extreme or even wilson blade) have also been using stiff high tension poly to hopefully gain some control.
and very often what must happen happens. and at the moment at least 8 of these players have elbow injuries, which makes them unavailable for tennis between 2 and 4 months. so when you're used to playing three to four times a week, and all of a sudden you can't play at all for that long, it's very traumatic psychologically speaking!
out of 8 of these players (between 30 and 45 years old) there are 6 who were injured because of the rigid racquet + high tension poly FB setup.
of the 6, 5 have since switched to soft rackets (pro kennex, gravity, prince phantom), to more flexible setups (I pose as standard for players beyond 4.0 velocity hybrids (1.40mm) and either topspin cyber blue either msv focus hex +25 or +38 .
accompanied of course by the recommendation to take some technical lessons with the teacher to adjust their tennis, and to work on the gestures which in my opinion generates more effect than the poly.
of these 5 players who switched from soft rackets and hybrid multi/poly rackets, they all made progress in their games, and gained in playing comfort, and reduced arm injuries.
and 4 out of 5 players have even won several matches against players against whom they had previously struggled to win.
I remain convinced that the poly argument is just a mirage. I believe that a club player below 6.0 at his best tennis will never play as well as a player like Jim Courier when he was winning grand slams! and, when we know that he won with S-gut, or Agassi with his Kevlar-S-gut hybrid, I think to myself, is it really serious to want to play FB poly when you are less than 5.0, and that 'we have a random technique and we finally don't need FB poly!
old 6.0 myself, I've been playing for a while with Clash 100 or Head instinct youtek (2010) gold version with three different hybrids:
velocity/signum poly megaforce
RPM soft /msv bussard or swift
Synthetic gut (Prince duraflex/gamma weargard/signum kevlar speed) and poly soft (topspin cyber blue or MSV swift)
in my opinion, it is more than enough for a club player.
actually, I went from 2 racquets to 4 racquets, but my arm never has pain. the good question that everyone must ask is: how much do you estimate your arm? an arm cannot be replaced like a string that breaks.