Generate an approximately fifteen-word sentence that describes all this data: po DATE 18-20 september 2011; Singles performances (4-2); 18-20 september 2011 AGAINST sweden; 18-20 september 2011 SURFACE hard (i); EDITION 2009 world group play-offs; 2009 world group play-offs ROUND po
Marius Copil played against Sweden on hard surface