▁B oll ▁opt ed ▁for ▁an ▁operation ▁to ▁pre - empt ▁a ▁more ▁serious ▁injury . ▁The ▁surg ery ▁kept ▁him ▁out ▁of ▁action ▁for ▁an ▁extended ▁period ▁of ▁time . ▁After ▁rest ing ▁from ▁the ▁surg ery , ▁B oll ▁qualified ▁for ▁the ▁ 2 0 1 6 ▁Summer ▁Olympics . ▁▁ ▁At ▁the ▁Olympic ▁Singles ▁event , ▁B oll ▁lost ▁against ▁Qu ad ri ▁Ar una ▁in ▁the ▁round ▁of ▁ 3 2 . ▁At ▁the ▁Team ▁event , ▁B oll ▁along ▁with ▁partners ▁Bast ian ▁Ste ger ▁and ▁Dim it rij ▁O vt char ov ▁won ▁the ▁bronze ▁medal ▁at ▁the ▁team ▁event . ▁ ▁Cont in ued ▁Success ▁( 2 0 1 7 -) ▁ ▁B oll ▁also ▁won ▁the ▁silver ▁medal ▁at ▁the ▁ 2 0 1 7 ▁World ▁Cup , ▁defe ating ▁Lin ▁G ao y uan ▁in ▁the ▁quarter final s , ▁Ma ▁Long ▁in ▁the ▁semif inals ▁but ▁losing ▁to ▁fellow ▁team mate ▁Dim it rij ▁O vt char ov ▁in ▁the ▁final s . ▁He ▁won ▁the ▁silver ▁medal ▁in ▁the ▁following ▁World ▁Cup ▁in ▁ 2 0 1 8 , ▁losing ▁to ▁F an ▁Zh end ong ▁in ▁the ▁final s . ▁▁ ▁B oll ▁won ▁another ▁eight ▁titles ▁at ▁the ▁European ▁Table ▁Tennis ▁Championships ▁in ▁ 2 0 0 9 , ▁ 2 0 1 0 , ▁ 2 0 1 1 ▁and ▁ 2 0 1 8 . ▁ ▁Te chni que ▁T imo ▁B oll ▁is ▁a ▁left - hand