Cardiff produced a remarkable defensive display to nil Ospreys at St Helen’s, winning 26-0 in Swansea.

Two tries from Tom Bowen, as well as scores from Josh Adams and Tom Howe, sealed a bonus point victory for Corniel van Zyl’s side in this Welsh derby. However, it was their red-zone defence that really shone through – as the Ospreys were kept off the scoresheet for the first time in over two years.

Despite a number of 22 entries, Mark Jones’ side were unable to find a way back into the match, having been stunned by three first-half tries.

The result saw Cardiff leapfrog the Ospreys, moving into the top eight of the United Rugby Championship.

After last week’s win against the Dragons, the Ospreys would have been hoping to keep the victories coming at their new home.

But, on a night when fans turned up in Halloween costumes, it was a frightful first-half for the hosts.

Cardiff dominated the breakdown throughout the opening 40 minutes, with Wales U20s duo Steff Emanuel and Bowen running riot.

Emanuel, in particular, looked the part – with the centre involved in all three first-half scores.

The first saw him loop a pass out wide for Bowen to dot down.

Ospreys tried to hit back, turning to their reliable driving maul – only for Cardiff to hold them up twice in quick succession.

Cardiff then doubled their lead, with Bowen racing away for his second after Emanuel’s pull-back pass to Jarrod Evans had created the space on first phase for the wing to get around Owen Watkin.

Emanuel wasn’t done there, hitting a hard line off a lineout before getting to his feet to dab a delicate grubber through for Adams – released from the Wales squad for this match in order to get much-needed minutes – to score.

Down by 19 points, the Ospreys threw everything at Cardiff in the second-half – with co-captain Sam Parry held up over the line.

The Blue and Blacks did occasionally ride their luck, with repeat penalties in their own red-zone leading to a warning.

But ultimately, opportunities came and went near the Cardiff line for the Ospreys without the scorers being troubled.

However, when Cardiff got their chance 10 minutes from time, they didn’t waste it. The highly-rated Howe was on hand at the back of the maul to go over for the bonus point try, capping a fine derby performance by Cardiff.

Ospreys: Iestyn Hopkins; Luke Morgan, Owen Watkin (co-capt), Keiran Williams, Keelan Giles; Harri Wilde, Luke Davies; Steffan Thomas, Sam Parry (co-capt), Tom Botha, James Ratti, Ryan Smith, Liam Wright, Ross Moriarty, Morgan Morris.

Replacements: Efan Daniel, Cameron Jones, Ben Warren, Huw Sutton, Morgan Morse, Harri Williams, Steff Jac Jones, Evardi Boshoff.

Cardiff: Matty Young; Josh Adams, Le Roux Malan, Steff Emanuel, Tom Bowen; Jarrod Evans, Johan Mulder; Danny Southworth, Dafydd Hughes, Keiron Assiratti, Josh McNally (capt), Rory Thornton, Semisi Paea, Dan Thomas, Alun Lawrence.

Replacements: Tom Howe, Scott Sio, Javan Sebastian, Tom Manz, Lucas de la Rua, Aled Davies, Callum Sheedy, Osian Darwin-Lewis.

See how the match unfolded below: