Leo Cullen says Leinster won't dwell on losing their winning run after being pipped at the post by Bulls on Saturday.
After winning all 16 games so far this season, Leinster lost 21-20 in Pretoria, with the hosts kicking the winning score in the 85th minute having earned a scrum penalty.
The sides had fought out a tough battle in 27 degrees heat, with the visitors' back rows Max Deegan and James Culhane forced off early with head injuries.
Both sides had players sin-binned, while Bulls full-back Sebastian de Klerk was issued a straight red card for a dangerous aerial challenge on Andrew Osborne.
Jordie Barrett and Osborne had scored tries and Ross Byrne's second penalty with two minutes left looked to be enough to maintain Leinster's winning run.
However, after a series of reset scrums, the Bulls pack forced a penalty that David Kriel converted.
Cullen admitted to a sense of frustration but was able to take positives from the fact that Leinster were missing so many of their international players, who were rested following the Six Nations.
"You get yourself in that position, there's a real opportunity there for you and you can't quite close it out," Cullen told RTÉ Sport.
"For a number of the guys that are there, it's an amazing experience. You think who was on the field at the end in particular.
"We were probably just too inaccurate overall in that 30 minutes that allowed Bulls to create dominant pictures around set-piece, we give away a penalty try, cough up a few scrum penalties as well, that probably plays into the referee's mind as well at the end.
"Even though it's hit and chase from them and it's unstable when we are putting the ball in, little things, but again we probably need to be better.
"Little bit frustrated but it's come off a period of some good progress overall. Even though you don't get four points you get one, it's a long way to go for a point but we'll take it and move on."
Leinster's lead at the top of the United Rugby Championship table is down to nine points with Glasgow in second place.
Bulls remain in third, while next Saturday's opponents Sharks (5.15pm, live on RTÉ2 and RTÉ Player) are in fourth after edging past Zebre, 35-34, at the weekend.
Cullen is expecting more of the same from John Plumtree's side.
"They are very aggressive in the air as well and they get a lot of reward," he added.
"They kick a lot from 9. The conditions down here are unusual. If you look on Google, the temperature is 27 degrees but it doesn't pain the picture of the humidity.
"It's sweaty, so handling can be a challenge. A strong aerial game, that's the first threat. Similar to all South African teams, a good set-piece, they will always challenge us there.
"Jason Jenkins [former Leinster lock] is in their ranks so he'll have an idea about what we are trying to do, which is always a danger.
"It's a good challenge away from home, Durban, Kings Park, it's such an iconic stadium so we're looking forward to the challenge."
Meanwhile, Cullen revealed that Deegan (above) will be available if he passes the return-to-play protocols, while Culhane won't be in consideration this weekend.
Cian Healy was pictured training with the team on Monday morning but the head coach declined to confirm if any other internationals would join up with the squad.
Back Rob Russell has been ruled out with a hamstring injury picked up at training, while prop Michael Milne will be assessed for a similar injury later in the week.
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