Someone said that Ostapenko's ball toss was going the way of Ivanovic, so it was fairly obvious that she was having physical issues.
This is what happens when your sport lacks a player's union.
The tournaments, even some coaches are most interested in getting these players to play tournaments, not to take time off to recuperate and heal.
At this point, it seems like you have to over 30 with multiple Slams not to be penalized for taking time off during the season.
It's not just Ostapenko, what about Madison Keys? Why was she out there playing when she clearly shouldn't be? This is the second tournament in a row where she either had to withdraw or retire from a match.