Adrenaline Or Something Else?

[vernonk]

This Polish guy playing Murray now... Playing by far the best tennis of his life. Interviewed after the quarter final he could barely speak but stood there shaking and otherwise looking out of it. Today, he is very hyper. even when leading, he went on and on and on at the umpire about the timing of the roof being closed. What is he on?

[vernonk]

Now he is talking to himself during a rally....

[jd_1984]

Probably adrenaline.