Southampton continued their march up the Championship table as they came from behind to beat fellow play-off hopefuls Derby 2-1 at St Mary's.
Second-half goals from Leo Scienza and Taylor Harwood-Bellis cancelled out Carlton Morris' earlier strike to extend the Saints' unbeaten run to 17 games.
It was a fast start from the hosts as Scienza got in down the left and pulled the ball across for Tom Fellows, whose heavy first touch cost him the chance to shoot.
Derby were forced into a ninth minute change when Bobby Clark limped off to be replaced by Oscar Fraulo.
The Rams started the day just three points behind Southampton and showed plenty of intent as they bid to secure a crucial victory.
A smart exchange of passes between Morris and Max Johnston saw the latter break clear down the left channel before he shot wastefully into the side netting.
Five minutes later, a sweeping Saints attack involving Casper Jander and Ross Stewart saw a chance fall Finn Azaz's way but he shot straight at Richard O'Donnell.
Derby were without United States striker Patrick Agyemang, who has been ruled out for the next nine months with an Achilles injury, denying him the chance to represent his country in a home World Cup.
Morris was tasked with leading the line for John Eustace's side in his absence and scored an unlikely opening goal when Joe Ward's corner deflected off Jander and dropped to him at the far post.
Saints sought a quick reply and went close as Harwood-Bellis nodded Ryan Manning's free-kick wide of the post as the wind swirled around St Mary's.
Again it was Southampton making all the running at the start of the second half and Scienza laid on a chance for James Bree, who sliced his shot well wide of the post.
Another chance soon came and went when Fellows headed Manning's cross over the bar from close range.
Derby were seeing little of the ball in the Southampton half but there was a rare test for Daniel
Peretz when he saved Sammie Szmodics' 20-yard shot low to his left.
Moments later, Saints got the goal they deserved when Scienza brilliantly finished off a flowing move by curling into the far corner after Jander and Azaz had created the opening.
St Mary's erupted once more when Saints went ahead as Harwood-Bellis this time connected perfectly with another Manning free-kick to head beyond O'Donnell.
Eustace quickly rang the changes as he looked to find a way back into the game and Harwood-Bellis reacted superbly to block Morris' effort from the edge of the six-yard box.
However, the Saints remained resolute and are now unbeaten since January 17.
Southampton's Tonda Eckert:
"It was an outstanding performance, I think the best one of the week. The boys have been absolutely outstanding today.
"We're clearly on top in the first half, then we didn't really finish our attacks to put it in the back of the net. You just have one loose ball and have to defend one corner, go down 1-0 and you don't really know why.
"That's just the way football games go sometimes and then to have that belief and just that deep, deep belief to keep going and being sure that the game then falls on to you."
Derby's John Eustace:
"That first 10 games for me was the key. We obviously recruited a little bit late. We recruited players that were injured and then had to get up to speed, which they have done.
"The first 10 games was always going to be a really difficult ask. After that, I said we'd progress and we'd get better. We've done that. It's been a fantastic effort. The season's not over and we're going to go again next week."
