A tennis pro needs possibly millions and millions of repetitions of a groundstroke to make it a pro-worthy shot. They need to have started hitting either a 1hbh or a 2hbh at the age of 2, and hit it for 12 hours a day until they are 20 - only then will it be a pro-ready shot. The grip, the swing path, the contact point - everything is set in stone at the age of 2 - and merely reinforced for those decades and decades of practice and billions and billions of repetitions. Having said all of this, how can Tsonga randomly decide he wants to hit a 1hbh instead of a 2hbh? There is no time for him now to complete the billions of repetitions needed to internalize a completely alien stroke. If he starts now and practices the 1hbh for 12 hours a day every day - he will be 40 by the time he has a 'pro-ready' 1hbh shot. Who cares if a 1hbh offers more reach on a passing shot - he has internalized a 2hbh, therefore he should use it for ALL situations. Does Federer use a 2hbh when returning serve? No, he dies with his ineffective technique, which is what Tsonga should do. If he had a coach, none of this craziness would be happening. What should Jo Willy do?