Also, according to news reports, David and JMDP will return to play against the Czech Republic in the quarters. I wonder how on earth this could be predicted this far in advance, and we don't know if he's playing the next two tournaments. Furthermore, no one knows his current state of health. Does anyone here believe that Vasquez and co. don't have their heads screwed on straight?
But the fact that it is that far away means that they don't need to be doubting his health at that stage.
(It's after Wimbledon) Basically it's just reporting that both David and Del Potro have committed to playing the QF tie, and that they want to play. In the same way that players commit to tournaments, in the expectation that they'll play unless if they're injured or ill.