Manager Allan Johnston says Kilmarnock have two must-win "cup finals" after the international break.
His side lost 1-0 at Dundee United which means he is 10 games without a win this season.
"It's two massive games coming up for us - Ross County and Hearts," Johnston told BBC Scotland. "It's two cup finals and we've got to make sure we win.
"I'm going to work even harder to make sure we turn it round."
Nadir Ciftci's goal ended up being the difference between the two sides.
Kilmarnock have not won at Tannadice now in their last eight visits.
The defeat meant Killie dropped to second bottom of the Scottish Premiership since St Mirren won at Hearts.
"It's a soft goal that's cost us again," Johnston said.
"It's really disappointing. I've got to take responsibility for that. It's me that picks the team, it's me that does the tactics so it goes on my shoulders.
"You take the plaudits when it's going well and you take the flak when it's not."
Kilmarnock were unfortunate not to get an equaliser when they rallied in the last 15 minutes. Jackson Irvine and Sammy Clingan both had fine efforts well saved by United goalkeeper Radoslaw Cierzniak.
"You can see the players we've got in there - they're good players," added Johnston.
"Towards the end we were probing and we were unlucky not to get a goal. That's the kind of characters we've got.
"The pressure's always on you no matter where you are."