Republic of Ireland put in a spirited display to secure a 0-0 draw with 10-man Portugal, whose hopes of automatic qualification for next year's World Cup now rest on a winner-takes-all clash with Serbia on Sunday
Portugal, led by Cristiano Ronaldo, dominated the early exchanges with Gavin Bazunu having to save from Andre Silva and Seamus Coleman blocking the Manchester United forward's goal-bound shot, but the hosts held firm as the first half reached its mid-point
Ronaldo wasted the best opportunity of the game midway through the second half, heading Andre Silva's cross wide before Portugal's challenge faded with the sending off of Pepe for two second-half bookings
Stephen Kenny's side tried to make use of their numerical advantage, but they were forced to settle for a point, which gives them the opportunity to finish third if they can beat Luxembourg in their final game of the campaign on Sunday, live on s
Meanwhile, the draw sees Portugal go top of group A on goal difference ahead of Serbia, who they host in Lisbon on Sunday, live on, for the chance to seal their place at the World Cup in Qatar
Portugal - who with one eye on Sunday left yellow carded players Joao Cancelo, Diogo Jota, Renato Sanches, Ruben Dias and Jose Fonte on the bench - started on the front foot and Banzunu had to be alert to tip Andre Silva's shot from a tight angle wide, while Seamus Coleman threw himself in the way of Ronaldo's goal-bound shot moments later
Ronaldo thought he should have had a penalty midway through the first half when going down under a challenge from Matt Doherty, but the referee allowed play to continue and it allowed the hosts to launch a counter-attack
Callum Robinson led the charge for the hosts and he forced Rui Patricio into action with a curled effort from the left before striking wide with another long-ranger effort before half-time
Republic of Ireland were more than holding their own and they created the final chance of the half, Chiedozie Ogbene heading over Robinson's cross to the near postRonaldo was looking a frustrated figure and it showed after he was brushed off the ball by Coleman as the second half got under way, and with Portugal's central defensive pairing of Pepe and Danilo looking less than convincing against Ogbene's pace, Ireland sensed an opportunity
Josh Cullen might have done better when presented with a shooting opportunity by Matheus Nunes' slip, but so too might Ronaldo when he drilled a free-kick straight at Duffy seconds later
However, the Republic enjoyed a major let off when Ronaldo guided a 67th-minute header just wide of the far post with Bazunu rooted to the spot
Pepe, who had earlier been cautioned for handball, was dismissed after an ill-judged 82nd-minute challenge on Robinson to spark a late Irish assault in which Will Keane was handed a late debut as a substitute, but Ronaldo might have won it six minutes into stoppage time if not for Bazunu's near-post block
"I would say so, yes [it's the best result of Stephen Kenny's tenure so far]
"To get a result against Portugal, who we would class as one of the top 10 international sides, it is a big result for Kenny
"It shows there has been a level of progress and an Irish side coming into this campaign you would have looked at the Portugal game and thought we need to get a point to try and qualify
"Obviously the early results put the team in a poor situation in terms of qualification but there are signs of progress and against Portugal, it's a good point and it gives them the opportunity to finish the group in third
""Republic of Ireland grew into the game and you could see the confidence growing, the crowd got into a bit and you could see the momentum
 But I actually feel, and I don't want to take anything away from Ireland's performance, but that's not a typical Portugal side
"I definitely feel they came to the game wanting a draw
 They had one eye on the game in Lisbon on Sunday
 They came for a draw and there was no cutting edge thrust from them whatsoever
"But Ireland might feel a little bit disappointed they couldn't get the win
 In the last 10 minutes, they certainly grew into the game, tried to create but they just didn't have that cutting edge or that little bit of class they needed in front of goal
"Republic of Ireland forward : "Winning is the main thing, but this has proven how far we have come as a group to compete against the top, the very best and we did a great job on him [Cristiano Ronaldo]
"We had a few half chances, but it was not to be
 It was a game that proved we're going in the right direction
"The fans are here, it was an amazing feeling and it was nice to get a result for them and we dug in
 On another night, with the half chances, we could've got a win
"Republic of Ireland defender , who won his 50th cap against Portugal: "I thought we performed really well
 It's more progress from the team and we're a little bit disappointed we didn't win, it was a real gutsy performance
"We kept a clean sheet against one of the best teams in the world and had chances so there's lots of positives
"If anyone had told you you would get 50 caps for your country you would laugh
 I'm very proud of what I've achieved so far, it's been tough and hard
"You never know if it's going to be your last so you want to enjoy every moment
"Republic of Ireland captain : "From the beginning you could see what we were trying to do and we looked comfortable for lots of the game
"Of course, I want him [Stephen Kenny] to stay
 You could see by the support, they're enjoying the football, the players are being brave, wanting the ball, enjoying the ball
"I love playing for Ireland, as players we're really enjoying it
"Republic of Ireland boss : "I thought we started a little nervously, Portugal were very good early on
 In the second half I thought we were the better team
"We scored a legitimate goal, it was not a foul, Will Keane stands his ground and we're disappointed [with the decision]
"We've played them twice, leading 1-0 out there after 88 minutes and in the second half tonight I thought we were excellent
"There's room for improvement but we had more shots on target than they did
 It was a good performance
 We've evolved, you can see the way we're playing
"In nine matches, we've only lost one, in Faro in the 97th minute
 We're going well
" on : "I think slightly wider is Robinson's better position
 I think having that freedom to come in from the outside suits him more
 I think when he's made to play that central role there's a responsibility to try and occupy defenders whereas he probably wants to be moving around and trying to find different pockets of space, but he did really well
 He was the bright spark for the Irish side
"Republic of Ireland have failed to score in 53 per cent of their 19 games in all competitions under Stephen Kenny (10/19), the highest ratio of any manager to take charge of more than two games for the national team
This was Portugal's first goalless draw in 36 World Cup qualifying matches (including play-offs), since drawing 0-0 with Sweden in March 2009
This was just Republic of Ireland's second competitive clean sheet against Portugal, and first since a 1-0 victory in a EURO 1996 qualifier in April 1995
Pepe's sending off was Portugal's first competitive red card in almost three years, since Danilo Pereira was dismissed against Poland in November 2018 in the UEFA Nations League
Cristiano Ronaldo was involved in seven of Portugal's 12 attempts tonight (5 shots, 2 chances created), though his only attempt on target came in the sixth minutes of second-half injury time
Republic of Ireland's World Cup qualifying campaign ends with a trip to Luxembourg on Saturday, live on ; kick-off 7
45pm
Meanwhile, Portugal's chances of automatic qualification go to the wire as they face Serbia in a winner-takes-all clash with Serbia in Lisbon, live on  via the red button; kick-off 7
45pm
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