The walkover means Jonny defends his points from this event last year, he has a few more semi final points to defend this season. Whereas this weeks points are the last that currently count for Luke, hes defending a title though from fairfield last year so the best he can do is a drop of 10 points this week.
He then needs to make Challenger finals minimum to increase his points. Luke needs to really play a few more ATP 250 events minimum to make any further progress up the rankings.