Billy Vunipola's late try capped a fine Saracens comeback as they secured a 27-9 bonus-point win in the European Rugby Champions Cup at Ulster.
The Premiership side began their Pool One campaign with an impressive victory over Toulouse, while Ulster's maiden outing of this year's competition at Oyannax was postponed following the terrorist attacks in France.
Ulster started much the stronger at the Kingspan Stadium and Paddy Jackson added nine points with the boot to underline their dominance.
But that sparked the visitors into life and Chris Wyles gathered a pass from Alex Goode to touch down and reduce the deficit, though Owen Farrell failed to add the extras.
The England man also missed with a tricky penalty attempt on the stroke of half-time as Ulster took a 9-5 lead into the break.
He did not have to dwell on that miss for too long as Goode's second-half try was converted by Farrell to put the visitors in front.
Farrell then turned provider to set up Duncan Taylor's five-pointer as Saracens took control of the contest, with the former adding a penalty soon after.
With the clock ticking down the English side pushed for a fourth try and the pressure told as Vunipola crashed over and Charlie Hodgson proved accurate from the tee.