Josh Law thinks it is "win or bust" for Motherwell against Kilmarnock as he tries to avoid a possible play-off showdown with his brother at Rangers.
The midfielder's side are six points behind Ross County and Friday's visitors with three games remaining.
"It could be an awkward one," he said of possibly facing brother Nicky.
"But we're both hoping it won't come to that position and, if we do our job, it won't come to that. We need to get the win to give ourselves a chance."
Well sit second bottom of the Scottish Premiership table, which makes them favourites to face either Hibernian, Queen of the South or Rangers in the Premiership play-off final.
But Law insists there is a positive mood in his squad is positive despite failing to reduce the arrears on County when the Dingwall side visited Fir Park at the weekend.
"Obviously last week we wanted more than a draw, but it's a point on the board that keeps us within distance of Kilmarnock and Ross County," he said.
"It makes tomorrow absolutely massive for us. You have to say it is win or bust really.
"With three games left and six points off, we've got to win tomorrow to bring to within three and that will make Kilmarnock or Ross County very nervous.
"There's always going to be tension there because of the position we're in, but there's also that confidence that we can still do this and a determination to do it more than anything.
Law wants to avoid suffering relegation in his first season with Motherwell.
"In a position like this, you've got to have broad shoulders, stick together and come through it," he said.
"Kilmarnock are on a bad run, but we need the win more obviously than them and they would be quite happy with a draw I would have thought.
"We need to go into the this game and win it and put the pressure on them even more."