As I said before and I will say it again
Grass is a tricky surface, your forced to play shots that normally on other surfaces you dont normally have to play,
Grass season is short, and the turn around from clay to grass is short and some players can transition well and others find if difficult
That does not mean that players who have lost today in their first round matches cannot improve their grass play
Coco still has doubles to play with Pegula they are the No 2 seeds, Coco has a solid net game and is good coming to the net on grass, a must on the grass
I would not right her off because she lost to a qualifer in Kenin who has come through qualifying matches to play the first round
If people actually watched the game you could see that Kenin was 'grass match fit' compared to Coco who didnt have a full preparation on grass.
Remember Coco is just 19 years of age, she has time on her side to improve on grass!!