Image source, Getty Images
Grace Moore scored two of Ireland's seven tries in Northampton
Jonathan Bradley
BBC Sport NI Senior Journalist
Women's World Cup - Pool C
Ireland (24) 43
Tries: O'Brien, Costigan, Higgins, McGann 2, Moore 2 Cons: O'Brien 4
Spain (12) 27
Tries: C Perez, Roman, Pena-Hildago, Alameda, Blanco Cons: Argudo
Ireland advanced to the Women's Rugby World Cup quarter-finals with a seven-try victory over Spain at Franklin's Gardens.
Scott Bemand's side, who did qualify for the last World Cup in New Zealand, had their bonus-point wrapped up by half-time but were made to work for the 43-27 win against a spirited Spanish side.
Anna McGann and Grace Moore both crossed twice for Ireland but Spain managed five scores of their own in a game the victors did not make safe until midway through the second half.
Despite their progression to the knock-out phase, it was not a wholly positive afternoon for Ireland who lost co-captain Sam Monaghan to injury in the first half.
Already without Erin King and Dorothy Wall for the World Cup, and with Aoife Wafer yet to feature at the tournament, Ireland will try to secure top spot in Pool C when they meet New Zealand in Brighton on Sunday, 7 September.
Ireland start strongly but Spain fight back
Ireland's management team had called for another quick start in Franklin's Gardens and got just that when Dannah O'Brien crossed for her first international try after only seven minutes.
The 21-year-old fly-half started the move with a testing kick to the Spanish backfield, although winger Amee-Leigh Costigan deserved plenty of credit for chasing forward to claim the loose ball. From there, Ireland worked the ball back inside for O'Brien to cross.
After going six-from-six off the tee in the opening win over Japan, O'Brien converted her own score.
On their next visit to the Spanish 22, Ireland scored again after knocking a penalty to the corner and using the maul to gain ground before the ball was released to the backs and Costigan went over in the corner.
Despite making seven changes from the win over Japan a week prior, it appeared that Ireland had not missed a beat.
Spain have proved an awkward opponent for Ireland in the recent past however, and this was to prove no different.
Using their maul to set the platform, winger Claudia Perez was the beneficiary of her forwards' good work that allowed her to scamper over in the corner for the score.
Five minutes later, Spain attacked off the maul again and this time there was no need to release the ball to the backs as hooker Marieta Roman barged across the whitewash and Amalia Argudo's conversion from the touchline levelled the score.
After a penalty from O'Brien came back off the post as Ireland sought to quickly regain the lead, tries from Eve Higgins and Anna McGann ensured they would have their four-score bonus in the bag before half-time.
Moore impresses in Wafer's absence
The game, however, still needed to be won, all the more so when three minutes after the restart centre Claudia Pena scored Spain's third of the afternoon to make it a one-score game once again.
Only then, did Ireland really take control of the high-scoring contest with number eight Grace Moore to the fore.
The side's back row depth has been greatly tested at this tournament with King and Wall both suffering injuries during the Six Nations that ruled them out the World Cup.
When Wafer will make her tournament bow has been a consistent question throughout the side's two weeks in Northampton but it was replacement number eight Moore who helped Ireland finally seize control of the game.
Consistently picking good lines to match her powerful carrying, her pair of tries were separated by 10 minutes and gave Ireland their biggest lead of the day just shy of the hour-mark.
Lourdes Alameda and McGann traded scores as Spain secured a try-bonus of their own, and it was the beaten side who had the final say when Cristina Blanco scored off an inventive line-out with the last play of the game.
Ireland will wait on news of Monaghan's injury and, of course, of Wafer's fitness but that such a rotated side helped the side into the last eight will only augur well ahead of the greater challenges to come.
Line-ups
Ireland: Flood; McGann, Dalton, Higgins, Costigan; O'Brien, Scuffil-McCabe; Perry, Moloney, Djougang; Corri-Fallon, Monaghan (co-capt); Tuite, Boles, Moore.
Replacements: Jones, McCarthy, McGrath, Campbell, Hogan, Lane, Breen, McGillvray.
Spain: Argudo, C Perez, Pena-Hidalgo, Cano, Piquero, Z. Perez, Fernandez de Corres, Silva, Roman, E. Garcia, Alameda, Martinez, Pineiro, Peralta, V. Perez
Replacements: Blanco, Delgado, de Andres, Puig, Castelo, N. Garcia, Vergara, Ducher
Referee: Kat Roche (USA)