Isner pulls out of the Australian Open

Just when it looked good when Fish and Isner were near top 10... its all going downhill for american men from there :(
Fish indefinitely out with his health issues..
Querry unable to get back his prime form.. again after his freak injury
Now, Isner... even before this injury his form was terrible..

maybe the americans need to get fitter? they all have huge serves but some of them are not the most athletic and flexible ones. they should not try to train themselves to grind but sometimes injuries can be avoided by better fitness regimens.