Goalkeeper Declan Rudd beat away a powerful Stuart Dallas shot at his near post, before Dallas scuffed a follow-up effort wide.

Alioski somehow fired over an open net in the 65th minute after Helder Costa's cross from the byline caught Preston napping.

Rudd tipped away Eddie Nketiah's glancing header a minute later as the pressure continued to grow.

Alioski smacked an effort against the foot of a post after 74 minutes from just outside the box and his luck was out again when Rudd pulled off a superb reflex save to keep out his header.

But Rudd was finally beaten when Ayling kept the ball alive to set up Dallas to give Leeds a deserved leveller.

"I was not happy with the first 20 minutes, it was not a good spell for us, we did not cope with their pressing and did not get into our game," Bielsa said. "I felt we took control after their goal.

"It was a better display from then and we controlled 75 per cent of the game. We had enough chances to win the game towards the end and we probably should have won it.

"I admire Preston for how they got at us in the first quarter of the game. They worked very hard to put us under pressure and close us down. We struggled to move the ball today.

"We had to move it sideways a lot and when we lost the ball going across the line it created problems for ourselves.

"I think we pressed the self-destruct button a few times which gave Preston their chances.

"Eddie Nketiah looked rapid and keen when he came on. There is still no news from Arsenal as to what they want to do with him at this stage. We want him to stay."

Preston boss Alex Neil was full of praise for his side as he hailed a point won.

"It took a deflected effort for them to get something from the game, Naturally we are disappointed not to win but I am proud of my players," he said.

"They are one of the top sides in this division and we more than matched them.

"I can't ask for any more from the players. They played really well and I felt we did enough to win the game.

"We have two home games coming up and we have a good home record, so we are looking forward to those.

"We've come up against one of the top teams in the division today and we've gone toe-to-toe with them.

"You can't question the effort from the players tonight and the quality that we showed to cut them open at times.

"I think we should be very pleased with what we've served up so far but we need to do that and more for the second half of the season.

"We are in a good position in the league, but there is a lot of work ahead still."