I'll put some predictions here:
USA - Australia: Favor USA 80% to win. Most likely scoreline 7-3 to USA.
Australia - SK (assuming Australia wins vs USA): Favor SK to win the series 85%. Most likely scoreline is 7-3 SK.
USA - SK (assuming USA wins vs SK): Favor SK to win the series 55%. Most likely scoreline is 7-5 7-4 USA.
USA - Australia: Favor USA 80% to win. Most likely scoreline 7-3 to USA.
Australia - SK (assuming Australia wins vs USA): Favor SK to win the series 85%. Most likely scoreline is 7-3 SK.
USA - SK (assuming USA wins vs SK): Favor SK to win the series 55%. Most likely scoreline is 7-5 7-4 USA.