a , ▁Fer rer ▁lead ▁ 7 – 4 , ▁splitting ▁their ▁two ▁matches ▁in ▁ 2 0 1 3 ▁both ▁in ▁the ▁final , ▁with ▁Fer rer ▁winning ▁at ▁the ▁Copa ▁Cl aro ▁and ▁W aw r ink a ▁winning ▁at ▁the ▁Portugal ▁Open . ▁At ▁the ▁final ▁match – up , ▁W aw r ink a ▁lead ▁B erd ych ▁ 7 – 5 , ▁winning ▁ 2 ▁of ▁their ▁ 3 ▁matches ▁in ▁ 2 0 1 3 , ▁including ▁their ▁last ▁encounter ▁at ▁the ▁Round ▁of ▁ 1 6 ▁at ▁the ▁US ▁Open . ▁ ▁Group ▁B ▁is ▁led ▁by ▁reign ing ▁Australian ▁Open ▁champion ▁Nov ak ▁Dj ok ov ic . ▁He ▁is ▁joined ▁by ▁ 2 0 0 9 ▁US ▁Open ▁winner ▁Juan ▁Martín ▁del ▁Pot ro , ▁ 1 7 ▁time ▁grand ▁sl am ▁champion ▁Roger ▁Feder er , ▁and ▁Richard ▁Gas quet . ▁Again st ▁the ▁rest ▁of ▁the ▁group ▁Dj ok ov ic ▁is ▁ 3 3 – 2 0 , ▁del ▁Pot ro ▁is ▁ 1 3 – 2 5 , ▁Feder er ▁is ▁ 4 0 – 2 1 ▁and ▁Gas quet ▁is ▁ 4 – 2 2 . ▁ ▁Despite ▁not ▁being ▁the ▁top ▁ranked ▁in ▁his ▁group , ▁Feder er ▁leads ▁every ▁head – to – head ▁in ▁the ▁group . ▁Feder er ▁against ▁group ▁B ▁leader ▁Dj ok ov ic ▁has ▁a ▁ 1 6 – 1 4 ▁record ; ▁however , ▁Dj ok ov ic ▁won ▁their ▁last