Table:
text: Selima Sfar
Singles
Singles
Date_ Tournament Surface Opponent_in_the_final Score
May 14, 2006 Jounieh Clay Anastasiya Yakimova 6–4 7–5
May 13, 2007 Jounieh Clay Mariya Koryttseva 6–2 4–6 7–6

Question: What surface was used for Selima Sfar on May 13, 2007?