In a crippled played successful blustery conditions arsenic a consequence of Storm Dave successful Belfast, early unit from Ulster told arsenic aft galore phases, nan returning Cormac Izuchukwu collapsed complete for nan opening effort connected 4 minutes.
Ospreys responded good to going down and, playing pinch nan wind, they sewage their first effort connected 9 minutes arsenic Morgan-Williams jinked his measurement complete aft a diligent move from nan Welsh side.
Mark Jones' broadside past went up connected 20 minutes pinch Morgan-Williams again astatine nan bosom of it arsenic he peeled disconnected a driving maul and fed Kasende, who evaded nan situation of Stuart McCloskey and crossed.
Edwards stretched their advantage to 10 points pinch a punishment earlier Ulster deed backmost pinch a 2nd effort earlier nan break.
They yet collapsed Ospreys' resoluteness connected 34 minutes arsenic Dave McCann grounded nan shot connected nan line, powering complete aft a speedy pat and spell penalty.
Ulster started good successful nan 2nd half and were rewarded arsenic Stockdale vanished disconnected a free-flowing move to title complete and reconstruct nan location side's advantage.
They produced immoderate ace last-ditch defending to clasp up Jac Morgan connected nan statement earlier Timoney past gave them immoderate breathing abstraction pinch a 4th effort connected 56 minutes.
McCloskey fed nan shot to Timoney retired connected nan near and he sold a saccharine dummy earlier darting to nan corner.
Things went from bad to worse for Ospreys arsenic skipper Morgan was shown a yellowish paper for a precocious tackle successful nan build-up to that try.
They managed not to concede immoderate much points while Morgan was disconnected nan transportation and alternatively trim nan spread to 4 points pinch 12 minutes remaining courtesy of a punishment try.
It was awarded erstwhile Luke Morgan was taken retired by a precocious tackle from Jack Murphy arsenic he looked to people successful nan correct corner, pinch nan Ulster fly-half sent to nan misdeed bin.
Ospreys continued to conflict and thought they had stolen nan triumph connected 78 minutes erstwhile Owen Watkin caught Ulster connected nan break and fed Kieran Hardy, who dotted down.
The effort was yet chalked disconnected pursuing a reappraisal from nan tv lucifer charismatic (TMO) which spotted a guardant walk successful nan build-up arsenic Ulster clung connected for victory.
Ulster: McIlroy; Kok, Hume, McCloskey, Stockdale; Flannery, Doak: Bell, Herring, O'Toole; Henderson, Izuchukwu; McCann, Timoney, Augustus.
Replacements: T Stewart, Crean, Wilson, Irvine, B Ward, McKee, Murphy, Z Ward.
Ospreys: Walsh; Kasende, Watkin, K Williams, L Morgan; Edwards, R Morgan-Williams; G Thomas, Parry, Henry, R Davies, Smith, Sutton, J Morgan (capt), M Morris.
Replacements: Daniel, S Thomas, Botha, Fender, Deaves, Hardy, Boshoff, Hopkins.
Referee: Anthony Woodthorpe (England)
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