Vika can still finish the year inside the top 2 easily if she performs as she can in the final stretch of the season. She should be relatively fresh given her lack of match play this season. It's going to take big performances but if she plays well Vika can come up big at this time of the season.
She needs to have a good summer and defend a good chunk of her USO points, which is doable.
Has she release her fall schedule yet?