Heart of Midlothian moved three points clear at the top of the Scottish Premiership with victory at Rangers as Russell Martin became the first Ibrox manager to fail to win any of his first five league games in 47 years.
Lawrence Shankland's 21st-minute strike gave Hearts a deserved half-time lead and, after the visitors survived some intense second-half pressure, the striker's late second left Martin and his side facing a chorus of boos at the final whistle.
It was Hearts' first win at Ibrox in 18 visits since August 2014 and their first victory in 19 meetings overall.
Martin had stayed loyal to the starting line-up that showed plenty of fight in their goalless draw at home to Celtic last time out.
However, Hearts arrived with a reputation of being the kings of winning duels around the pitch and they did so from the off as they quickly pinned the home side into their own half.
Unmarked former Rangers youth centre-half Craig Halkett headed wastefully over from an early free-kick and Shankland fired straight at goalkeeper Jack Butland before Rangers had even threatened an attack.
Claudio Braga had also already given the tentative Rangers backline a few nervous moments before the summer arrival from Aalesunds set up his strike partner for the opening goal.
Rangers' defence looked to be expecting the game to be halted for a hand ball as a neat flick from the Portuguese set up Shankland to fire low past Butland into the far corner.
Home winger Djeidi Gassama had made a mess of a shot in front of goal shortly before that, but that was a rare foray into the visiting penalty box.
Rangers' response to going behind was equally uninspiring, their main threat coming from a curling cross-come-shot from Thelo Aasgaard turned on to the crossbar by Alexander Schwolow, while striker Bojan Miovski headed unconvincingly into the debutant goalkeeper's arms.
Two substitutions and a half-time break later and Rangers were transformed.
Gassama curled a drive off the face of the far post, Schwolow pushed clear a powerful drive from Oliver Antman and fellow replacement Derek Cornelius prodded home only for the goal to be ruled out for a push on the goalkeeper.
Any hopes of a fightback was ended when Harry Milne went down under a challenge from Mohamed Diomande and, after a lengthy video assistant referee review, a penalty was awarded.
Although Shankland's spot kick was saved by Butland, the striker slotted the rebound to leave the home side and their support stunned - and it could have been worse had Tómas Bent Magnússon not found the far post in the dying seconds.
