Southampton broke a 103-year-old club record in a 3-1 win at Swansea on Saturday by going 21 games unbeaten to move into second place in the Championship.
Che Adams, Will Smallbone and Flynn Downes all struck before halftime to give Russell Martin a winning return to south Wales.
"I'm really grateful to the players for what they've done, the courage they've shown. I'm immensely proud," said Martin, who managed Swansea for two years prior to joining Southampton in June.
"The way they did it in the first half, (is) one of the best performances I've ever been involved in as coach.
"It's taken a lot of hard work and they've really stepped up. They've written themselves in to the history books - and let's keep it going."
Southampton have now eclipsed their best unbeaten run in all competitions since joining the Football League in 1920.
Into the history books
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