Huddersfield beat MK Dons to claim second spot in League One.
A stunning strike from Scott Arfield and Lee Peltier's close-range header gave the visitors a first-half lead.
The Dons had the chance to level in between after Peter Clarke felled Daniel Powell in the box but keeper Ian Bennett saved Peter Leven's spot-kick.
The Terriers then saw an Arfield penalty saved before Danny Cadamarteri knocked in and Mathias Doumbe's header proved a mere consolation for the Dons.
The game kicked into action after Arfield's powerful right-footed finish from 20 yards.
The Dons should have equalised but Leven's penalty, awarded after Powell went down in the area, was easily saved by in-form Bennett.
And moments later the Terriers doubled their lead when Gary Roberts' corner found an unmarked Peltier.
Huddersfield continued to dominate after the break and won the second penalty of the game when Benik Afobe was brought down by defender Gary MacKenzie.
Arfield stepped up but Martin parried his kick away and Afobe missed with the rebound.
The visitors continued to search for a third and made the breakthrough when another Roberts cross reached Cadamarteri who nodded in.
Their concentration lapsed in the dying minutes, allowing Doumbe to head in but it was too little too late for MK Dons.
The result means Huddersfield leapfrog Southampton, who play champions Brighton on Saturday, into second place in the table although Lee Clark's side have played two more games than Saints.
MK Dons stay fifth, three points off fourth-placed Peterborough.
MK Dons manager Karl Robinson told BBC Three Counties Radio:
"I thought the football we played, the momentum we had, the way we retained it, it was almost a perfect performance. We missed too many chances.
"We must have doubled their shots on target, and crosses as well. That's where it is very difficult to accept.
"I'm walking away from here a very positive man with a strong belief in the team that we have assembled here."
Huddersfield Town manager Lee Clark told BBC Radio Leeds:
"The lads are having a little moan that I'm never happy but I said I know because I'm always striving for perfection. You never get perfection because your always raising the bar.
"All we've got to do is get the players on the bus and feed them and get them recovered tomorrow and Sunday because Dagenham is going to be a very, very tough game and they're going to make it difficult at the Galpharm on Monday.
"We have to be patient and the fans have to be patient."