Manager Stuart McCall was thrilled by his understrength Motherwell side's victory over Dundee United.
"That result is outstanding as Dundee United are an excellent side," he said after the 2-1 victory at Fir Park.
"They've won six league games on the bounce, beating Rangers at Ibrox, and they have quality players.
"We had four regulars out and we had lads running on empty in the last 15-20 minutes. But we hung in there."
Motherwell were 2-0 in front at the interval thanks to goals from Jamie Murphy and Chris Humphrey but United finished the game strongly.
The visitors reduced the deficit with 11 minutes remaining through a Johnny Russell header and home keeper Darren Randolph was required to make two excellent late saves.
"A team as good as Dundee United are going to have spells in the game," explained McCall. "You've got to accept that and you have to defend well when they do.
"And we did that ever so well. We got some great blocks in and big Daz made some great saves.
"We got home through grit, determination and desire.
"It's disappointing to lose a goal from a set-piece but when you look at Garry Kenneth, Scott Severin and Jon Daly - they are a big, big side."
Motherwell, who have beaten United four times this season, can make sure of the last available top six place with a win at Hearts on Saturday.
"Inverness have still got nine points to go for and I wouldn't put it past big Butch (Terry Butcher) to go and get them," added McCall.
"I know they've got Celtic and Hearts at home but we've got to go to Tynecastle and do our upmost.
"We had four lads in the stand tonight who are itching to get back and, hopefully, because we have a good week off after the Hearts game before the Scottish Cup semi-final, we'll have time to recharge the batteries.
"I'll have some tough decisions come the semi but Hearts are foremost in our minds."