After the -
* the Dubai tournament won by Karatsev;
* the Mexican Championship won by Sverev in Acapulco; and
* The Montpellier Tournament won by Medvedev
what happened in the next tournament in Miami in which all three players played?
* Karatsev lost in Round 3;
* Sverev lost in Round 2; and
* Medvedev lost in the Quarterfinal.
All three was way below their normal performances.
It does not end there - in Acapulco Tsitsipas was the runner-up - but his performances thus far in Miami was also below the level of performances normally expected from him. We will have to wait and see what happens to him in the quarterfinal tonight.