I find generally international play does not involve the kind of beating up on players that you see especially in the college game in the US. There is more body contact allowed in international play, but arms and hands including the forearm in the small of the back are called pretty tightly. It may be different at the club level as you probably have less consistent referees. The 'flagrant foul' calls are also at a much lower tolerance level and that too reduces the hard fouls.
Post play is always a different beast - and I think Griner or any newby is going to get tested - and as soon as it doesn't effect her game, it will stop. But right now it does seem to get her a little rattled.