▁pace ▁to ▁sit ▁behind ▁the ▁leader , ▁as ▁they ▁approached ▁the ▁third ▁b end ▁the ▁race ▁was ▁wide ▁open . ▁Five ▁of ▁the ▁six ▁grey h ounds ▁passed ▁the ▁line ▁together ▁with ▁I ' m ▁S li ppy ▁just ▁holding ▁on ▁in ▁a ▁photo - fin ish . ▁ ▁Qu arter - final s ▁ ▁Sem if inals ▁ ▁Support ing ▁R aces ▁Five ▁track ▁records ▁fell ▁on ▁the ▁Derby ▁final ▁night ▁including ▁that ▁of ▁the ▁Derby ▁distance ▁when ▁Hay ▁M aker ▁Mack ▁won ▁the ▁English ▁Grey h ound ▁Derby ▁Inv itation ▁and ▁became ▁the ▁first ▁ever ▁dog ▁to ▁break ▁the ▁ 2 9 - second ▁bar rier , ▁posting ▁ 2 8 . 9 5 ▁sec . ▁Hay ▁M aker ▁Mack ▁had ▁won ▁a ▁Derby ▁heat ▁before ▁being ▁knock ed ▁out ▁and ▁his ▁racing ▁career ▁ended ▁soon ▁afterwards , ▁when ▁he ▁sust ained ▁a ▁broken ▁h ock ▁during ▁the ▁Es sex ▁V ase ▁at ▁Rom ford . ▁The ▁other ▁four ▁track ▁records ▁were ; ▁P agan ▁P ans y ▁ 2 9 . 8 8 ▁( 5 0 0 ▁metres ▁hur d les ), ▁Sir ▁W inst on ▁ 3 0 . 3 8 ▁( 5 0 0 ▁metres ▁ch ase ), ▁Ce ili ▁L ass ▁ 4 0 . 7 5 ▁( 6 8 0 ▁metres ) ▁and ▁Minn is ▁Mat ador ▁ 4 3 . 8 2 ▁( 7 3 0 ▁metres ). ▁ ▁See ▁also ▁ 1 9 8 3 ▁UK ▁& ▁Ireland ▁Grey h ound ▁Racing ▁Year ▁