Just read the whole article in New York Times.
This is good analysis, writing , AND COACHING.
Analysis from James Hansen, senior editor for tennis
In this specific matchup, Michelsen’s ability to hit down-the-line and cross-court on his backhand from almost any position prevented Tsitsipas from using his favorite tactic. He knows his one-handed backhand can hamper him, so tends to try and hit an inside-out forehand (a forehand from the ad-court) as early as he can in a rally. To do this, he shuffles to his left, but this leaves him open to being attacked if his opponent can hit a backhand into that space. Michelsen can do that.
Tsitsipas could neutralize that problem with a slice, or a short ball, but he isn’t comfortable playing those kinds of shots. As a result, he found himself caught in a tactical fight he could not win.
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