Two late goals have secured Tottenham Hotspur a spot in the FA Cup fifth round as they beat Southampton 3-2 in their fourth-round replay.
Jose Mourinho's men looked to be heading out of the competition with less than 15 minutes remaining as Saints goals from Shane Long and Danny Ings overturned an early Jack Stephens own goal.
Spurs rallied when they needed to, though, with Lucas Moura and Heung-Min Son from the penalty spot, scoring the goals that set up a home tie with Norwich City early next month.
A quarter-final spot will be at stake in that match and Mourinho will be viewing this competition as a great chance to get some early silverware at Spurs.
Tanguy Ndombele's deflected strike in the 12th minute gave Spurs the lead before Long poked in a rebound to make it 1-1 at halftime.
Ings produced an excellent finish for Southampton to move in front on 72 minutes but Lucas Moura drilled home a long range effort six minutes later.
With four minutes left to play, Son was in a one-on-one situation with Angus Gunn and was tripped by a sliding leg of the Saints goalkeeper.
Son finished the tie by firing his penalty low into the bottom left corner.
There was a sad moment for Spurs as 32-year-old Jan Vertonghen appeared close to tears after being tactically substituted in the second half.
The Belgian is out of contract in the summer and had the look of a man who knows his days at Spurs could be numbered.
Southampton will be wondering what happened as they had been by far the better side, yet collapsed after going in front, and they are now left to focus on pushing for a Europa League place in the Premier League.
Mourinho felt the Saints were the better side but he praised the attitude of his players.
"I have to be honest, I think the best team lost," Mourinho told BT Sport 1.
"But the team with more heart, the team that went to their limits, the team that had so many difficulties even to build a team, that team that did not have options to change the game.... my team deserved to win."