- 2 0 1 5 ) ▁ ▁In ▁ 2 0 0 7 , ▁he ▁won ▁the ▁European ▁Championship ▁singles , ▁doubles , ▁and ▁in ▁the ▁team ▁competition . ▁He ▁was ▁also ▁active ▁as ▁a ▁guest ▁player ▁in ▁the ▁Chinese ▁Super ▁League . ▁ ▁During ▁the ▁ 2 0 0 8 ▁Summer ▁Olympics ▁in ▁Be ij ing , ▁he ▁participated ▁again ▁with ▁the ▁German ▁national ▁team . ▁After ▁vict ories ▁over ▁Cro atia , ▁Canada , ▁Singapore ▁and ▁Japan ▁in ▁pre lim inary ▁r ounds ▁and ▁the ▁semif inal , ▁the ▁team ▁lost ▁ 0 – 3 ▁against ▁the ▁host ▁Chinese ▁team . ▁As ▁the ▁top - rank ed ▁player ▁in ▁ 2 0 0 8 , ▁B oll ▁successfully ▁def ended ▁his ▁three ▁European ▁Champion ▁titles ▁from ▁the ▁previous ▁year . ▁ ▁At ▁the ▁ 2 0 1 2 ▁Summer ▁Olympics , ▁B oll ▁lost ▁in ▁the ▁last ▁ 1 6 ▁to ▁Ad rian ▁Cris an ▁but ▁the ▁German ▁team ▁won ▁the ▁bronze ▁medal ▁in ▁the ▁men ' s ▁team ▁event , ▁losing ▁to ▁China ▁in ▁semif inals ▁but ▁be ating ▁Hong ▁Kong ▁in ▁the ▁bronze ▁medal ▁dec iding ▁match . ▁ ▁Back ▁problems ▁led ▁B oll ▁to ▁not ▁particip ate ▁in ▁the ▁ 2 0 0 8 ▁and ▁ 2 0 0 9 ▁World ▁Championships ▁in ▁China ▁and ▁Japan ▁respectively . ▁At ▁the ▁ 2 0 0 8 ▁World ▁Cup ▁in ▁Li ège , ▁he ▁scored ▁a ▁semi - final ▁victory ▁over ▁Ma ▁Long ▁but ▁lost ▁out ▁in ▁the ▁final ▁against