Prop Ellena Perry said that Spain pushed Ireland “right to the end” in her side’s 43-27 win at Franklin’s Gardens.
Ireland advanced to the Women’s Rugby World Cup quarter-finals with a seven-try victory over a dogged Spanish side in Northampton.
And Perry, who was named player of the match on her first start for Ireland, was content with the hard-fought victory.
“They really did [test us], we knew all week they would come out firing and fair play to them, it was a tough game,” she told BBC Two.
“We knew they were going to be tough competitors all game, and they pushed us right to the end.
“We just needed to get front-foot ball and make sure we kept possession; it was difficult but pleased to get the win.”
Scott Bemand’s side have now won their opening two Pool C games to reach the knockout stages after beating Japan in their opening game last weekend.
They face New Zealand next Sunday in their final pool game in Brighton, aiming to secure top spot.
The fixture against the reigning World Cup holders is one that Perry is relishing.
“Two bonus-point wins which we can’t fault but plenty of learnings this weekend and we’re really excited for a big game in Brighton next week.”