Juan Martin Del Potro wins ATP tournament in Basel . Beats home favorite Roger Federer in three set final . Score: 6 Mikhail Youzhny beats David Ferrer in Valencia final .
Juan Martin Del Potro wins ATP tournament in Basel . Beats home favorite Roger Federer in three set final . Federer must wait to clinch place in ATP World Tour Finals . Mikhail Youzhny beats David Ferrer in Valencia final .