The subject has been studied scientifically, though not with tennis players.
In 1864 the area around the stone circle was first studied scientifically.
I do not know that the mechanism has ever been studied scientifically, but the effect is certainly true.
It gives new hope to people who believe that human behavior can be studied and explained scientifically.
How is the existence of the independent universe to be scientifically studied?
For the first time, economists are studying these phenomena scientifically.
Speeds and feeds have been studied scientifically since at least the 1890s.
Its disinfection ability has been scientifically studied for over a century.
The concept of acculturation has been studied scientifically since 1918.
The pervading question was whether this kind of experience could ever be studied scientifically.