http://news.yahoo.com/s/afp/20090910/sp_wl_afp/tennisusaopendelpotro]Del Potro into US Open semis (AFP)[/URL]



AFP - Argentina's Juan Martin del Potro converted eight of eight break points to reach the semi-finals of the US Open on Thursday with a 4-6, 6-3, 6-2, 6-1 win over Marin Cilic of Croatia.