Without grouping date values we need to customize x-axis label values week starting day. One more condition is we need to show all the value points in a week.
Right now my chart is
And what we need is
Just add the following calculated column in the query editor Edit Queries > Add Column > Custom Column
:
Drag and drop the custom column into your visual and you are done. Don´t forget to change the type of the column to date format.