A late Morgan Allen try with one minute remaining secured victory for the Ospreys, after a remarkable comeback from Gloucester in a fascinating LV= Cup clash at the Liberty Stadium.
Matthew Morgan inspired the hosts to an 18-13 lead, kicking all 18 points, before being replaced by Sam Davies, son of Gloucester ’s director of rugby Nigel.
And after finding themselves 26-13 down with 15 minutes to go, the Cherry & Whites scored two late tries to edge 27-26 ahead before Allen’s last-gasp effort completed a thrilling finale.
The hosts had an early opportunity to take the lead, Tim Molenaar penalised for a high tackle after three minutes, but Morgan’s kick drifted just wide.
Although a young Gloucester side took a 3-0 lead after nine minutes, Billy Burns scoring the first points of the night, the visitors infringed at the breakdown within a minute and Morgan levelled the scores.
After 16 minutes Burns kicked his second penalty of the evening to put the Cherry & Whites ahead once again.
But a sustained spell of Ospreys pressure saw them force the advantage from referee David Rose, and Morgan’s drop goal again drew Steve Tandy’s men level.
With 25 minutes on the clock James King saw yellow for coming in from the side and breaking the side of the ruck much to the anger of the partisan home crowd.
And their frustration was compounded when Yann Thomas went over for the first try of the evening immediately afterwards, Ross Moriarty drawing the tackle before off-loading the ball, Burns adding the extras to give Gloucester a 13-6 lead.
Despite being a man down the hosts managed to hit back, Morgan kicking his second drop-goal as the hosts opted to get points on the board.
With half-time approaching Morgan reduced the deficit to just one point, kicking his second penalty after Peter Buxton was adjudged to be offside, and seconds before the interval Morgan kicked three more points to give his side a 15-13 lead.
The rain began to lash down as the second half got underway, and Morgan missed an early chance to extend the Ospreys lead, his penalty going just wide of the posts.
The poor conditions meant the rugby was particularly error-strewn, but with the Ospreys building momentum, Buxton was yellow-carded for a deliberate knock-on, and Morgan converted the penalty.
In the 62nd minute, fly-half replacement Davies extended the hosts’ advantage, two minutes after coming on, kicking a penalty on his Ospreys debut.
Two minutes later Davies kicked for the corner, and from the resultant lineout the hosts scored their first try – George Stowers breaking powerfully, before Davies spread the ball left to Tom Grabham who went over, Davies missing the conversion.
With the visitors 13 points behind there seemed little hope, but they got their second try over the evening with ten minutes remaining.
Shane Monahan burst down the right, and the Cherry & Whites kicked for the corner, Dan Murphy sliding over with Dan Robson adding the extras.
And with five minutes left, the visitors surged forward and after concerted pressure down the left the referee awarded a penalty try, Robson adding the extras to complete a remarkable turnaround, Gloucester taking a 26-27 lead.
But in incredible circumstances the hosts threw everyone forward, and sheer pressure led to Allen surging forward to go over the line, Davies adding the extras to secure the win 33-27 despite Gloucester’s late rally.