NI will have 'one last swing' at World Cup place

McArdle handed debuts to Linfield defender Jane McMaster, Sparta Prague forward Kess Elmore, who made a lively appearance off the bench, and 16-year-old Cliftonville midfielder Charlotte Havern.

Aside from striker Cora Chambers, who was sent off in the closing stages of the loss on Friday, Northern Ireland have a full compliment of players to pick from for the second leg.

Telma Encarnacao scored an early opener in Larne before before Jessica Silva doubled the lead and Rebecca Holloway scored an own goal inside the opening half hour.

Northern Ireland improved after the restart, and looked the better side after Catarina Amado's red card, but could not find a goal their pressure deserved, and the visitors capitalised as Fatima Pinto scored a speculative, long-range fourth.

McArdle knows where his side need to improve heading into the second leg.

He pointed to how Portugal were able to exploit the gaps between the centre-backs and the inexperienced full-back duo of McMaster and 19-year-old Emily Cassap, and how his own team could not convert their pressure into goals.

"The immediate reflection was misfortune with the scoreline, and how it was a bit harsh," he said.

"Reflection-wise we still feel that way, however there's areas that we need to improve upon before the game.

"There were some positives but obviously the scoreline is the scoreline."

Even if Northern Ireland can pull of a miracle in Portimao, they would still face an uphill task to reach a first-ever World Cup.

Iceland, who are 4-0 up against Croatia from their first leg, would likely be the second-round play-off opponents and, even then, Northern Ireland would probably then face an additional inter-confederation play-off due to their Uefa ranking.

But McArdle knows he is not just working towards the finals in Brazil next summer, but further ahead.

The Scot feels he has seen "lots of progress" in his six months in charge, and feels that will only improve as he continues to get to know his squad.

"You've seen that with the new players, the amount of debutants and the amount of youth players that come into the squad over the three camps I've been involved now.

"We're now in a really strong place, and from the next window onwards we'll to start prepare and focus on trying to qualify for the Euros.

"That'll be the most important piece after Tuesday, but we'll have one last swing and see where it goes."