Losing 75 63 and being only one point behind on total points is quite weird. She seems to have lost all the important points and winning only 42% of your first serves surely doesn't help.
The official stats have the points at 66 vs 54 to Sorribes, which is about right for the score.
The 12 point difference indicates Annika lost 6 key points which decided the match. (If she wins these 6 points, her total is 6 pts higher and the opponent 6 pts lower and they are dead even).
So for her to win by the same scoreline, she would have probably needed to win 12 key points, reversing the point difference.
Winning 43% on first serve is not good enough of course, especially when she was winning 48% on second serve. I wonder why she couldn't win points behind the first serve. In that situation, when you are winning more points behind the second serve rather than the first, I would consider going for broke on the first serve since even if you have to hit a second serve the situation isn't actually any worse.
By the way, I don't know if it's just me, but the wta live scoring app isn't showing the completed matches for me. However, if I go to the schedule and go back one day, I can click on the match and get the stats.