I watched the Haase match, and he was very upset that the match wasn’t suspended due to darkness during the fourth set, which he was losing. (He was up two sets to one, but Goffin had all the momentum.) Haase was even more incensed when they decided to move forward with a fifth set and, during the changeover, he called for the trainer, who made the call that Haase wasn’t actually injured. I think most observers figured he was just acting and stalling for time to show his displeasure (and perhaps delay the match so it would legitimately be suspended). Goffin proceeded to bagel Haase in that fifth set.
I used to dislike Ostapenko (especially after how obnoxious she was after Kasatkina beat her in Charleston), but I was pleasantly surprised how gracious she was in losing to Sloane in the Miami final. She just hits hard with no margin, which is dangerous when she’s on and disastrous when she’s not. Kozlova obviously has her number as she’s beaten Ostapenko every time they’ve played.