A wonderful solo goal from Armando Broja and a nerveless James Ward-Prowse penalty sent Southampton through to the FA Cup quarter-finals with a 3-1 victory over West Ham
Ralph Hasenhuttl's side are now unbeaten in their last 12 home matches and, despite the Saints boss making nine changes to his team, they produced a fine performance to progress
Impressive left-back Romain Perraud struck a superb opener from 25 yards that found the top corner, but Michail Antonio equalised in the second half after a Willy Caballero mistake
However, the veteran goalkeeper, 40, made up for his error with a crucial save late on from a Craig Dawson header
 It came after captain Ward-Prowse had regained the lead for Southampton from the penalty spot
 Broja - a second-half substitute - was brought down in the area by Dawson with a penalty awarded after VAR instructed referee Andre Marriner to watch the incident on the pitchside monitor
Broja then made sure Southampton would be heading to the last eight in injury-time by driving at the West Ham defence, beating Kurt Zouma and slotting past Alphonse Areola into the bottom corner
Hasenhuttl's team selection, in which he benched regular first-teamers Oriol Romeu, Che Adams, Nathan Redmond, Stuart Armstrong, Broja and Tino Livramento, could have easily backfired
In contrast, West Ham boss David Moyes made just two alterations from their  in a bid to lift some silverware this season
The visitors started well as Jarred Bowen almost raced through on goal but was stopped by a good tackle from Jack Stephens
It set the tone for the opening 20 minutes and West Ham's first chance came soon after from a lovely move involving Manuel Lanzini and Pablo Fornals, the ball eventually falling kindly for Tomas Soucek, but he shot wide from inside the area
Then their best opportunity came the way of Bowen, who headed over from inside the six-yard box from Antonio's left-wing cross
Southampton had barely been able to enter West Ham's final third although, when they did, Will Smallbone centred the ball and Shane Long blazed over with a first-time effort
It took left-back Perraud to light up what had been a lacklustre tie
 The Southampton defender picked up the ball 30 yards from goal on the left side before driving an unstoppable shot into the far top corner
Hassenhuttl brought on two of his regular first-teamers at half-time in Stuart Armstrong and Broja for Long and Moussa Djenepo to try and put the tie beyond West Ham
Ward-Prowse almost did so with a dipping long-range shot which just went wide before Soucek was replaced by Said Benrahma after receiving a blow to the head that left him bleeding heavily
But the injury did not faze West Ham and they equalised just before the hour mark
 The warning signs were there for Southampton when Zouma headed a corner over from close range and then, from another, Antonio scrambled the ball home after Caballero failed to punch the delivery clear
However, the visitors were level for just nine minutes before Southampton regained the lead
 A long ball from Stephens was latched onto by Broja, and he was brought down in the area by Dawson with a penalty eventually awarded, which Ward-Prowse expertly hammered down the middle
Areola saved excellently from substitute Redmond's long-range drive in the final 10 minutes before Caballero kept out Dawson when he powered a header at goal from Bowen's in-swinging corner
Broja then had his moment in the fourth of seven added minutes, powering past the West Ham defence and finishing calmly
Hasenhuttl revealed Perraud's goal was helped in part by the FA Cup match balls being lighter than the usual Premier League footballs
"It was an amazing goal," he told the BBC
 "The ball in the cup is lighter and that's why you can shoot outside the box
 We have a few good guys who can score goals from them
"Hasenhuttl also explained his decision to make nine changes from their , with only Kyle Walker-Peters and James Ward-Prowse retaining their places
"You can't speak about having a big squad and trusting everyone and not show the right signals," he said
"It was hard for them in the beginning with no rhythm playing in front of 28,000 fans
 It was clear with five subs you can decide the game in the second half with subs
"Armando Broja had a good impact in the game
 He is a threat with speed
 We have quality and created some good parts in our game
"Making nine changes doesn't mean that we're not looking for this cup
 It's a super opportunity for us
 But we shouldn't forget these players have brought us here
"We should give them a chance to play again
 It's tough but as soon as you saw players struggling after the Norwich game we knew we should make changes
"Moyes admitted his West Ham side did not do enough to get through to the FA Cup quarter-finals
"We probably didn't deserve it," he told the BBC
 "We went behind to a worldie and we fought back
"I thought we were probably the better team at those stages of the game
 We gave away a terrible second goal and the third didn't matter
 We didn't do well enough to get through
"Congratulations to Southampton
 I thought in the first half we had a lot of the ball but not the quality in the final third
 We didn't take our half-chances
 In the second half after we got the goal back and it looked like if any team was going on to win, it was us
"Southampton's opening goalscorer Perraud told the BBC after the game:"I think it's a great goal for us
 We did a very good performance with some players who don't play every game against a good team
"Congratulations to the team and the club
 Now we wait for the next round
 West Ham played with their best team so it was difficult for us but after 15 or 20 minutes we began our game and we deserved this win
"We are ninth in the Premier League and in the last eight of the FA Cup
 We can dream
 We'll wait for the next round but it's important for our confidence
 Game after game we're in a good moment and we have to work on this
"Southampton will next face Aston Villa in the Premier League on Saturday at 3pm
West Ham will travel to Anfield to face Liverpool in the Premier League on the same day at 5
30pm, live on 
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