Celtic were beaten 1-0 by Hearts in a fiery encounter on Saturday lunchtime.
Former Rangers striker Kyle Lafferty scored a brilliant winner early in the second-half to give Hearts three huge Premiership points.
The 30-year-old, who has been linked with a move back to Rangers, netted a sensation volley to dent Celtic's title hopes.
In May, Hearts man Steven Naismith hit the headlines following a disgraceful foul on Celtic captain Scott Brown.
He was ruffling feather once again on Saturday afternoon.
Naismith v Hendry
Jack Hendry joined Celtic from Dundee for £1.5m in January - and the young centre-back made his first league start of the season.
It was a difficult day for the Glaswegian, who had his hands full with Lafferty and Naismith.
With stoppage time approaching, Rangers fans on social media were all laughing at an incident involving Naismith and Hendry.
The 31-year-old attacking midfielder won a free-kick for Hearts and immediately got to his feet in order to laugh in Hendry's face.
You don't see this kind of thing in the Premier League.
Naismith spent five years at Rangers and his performances against Celtic are earning him a lot of love among Gers supporters.
Steven Gerrard's Rangers side can climb above Celtic by beating St Mirren at Ibrox on Sunday.
After their shock defeat at Tynecastle, Chris Sutton suggested that Celtic should've brought in John McGinn.
The Bhoys failed to sign the Hibernian midfielder, who ended up joining Aston Villa instead.
"Well done to Craig Levein and Hearts," wrote Sutton on Twitter.
"Celtic roughed up by Hearts…a lot of changes for Celtic but not the depth. For all those saying Mcginn wouldn’t have made a difference… really??"
After the 1-0 defeat, Brendan Rodgers said his squad needs to be improved but claimed he has no intention of leaving his post.
"I can’t go on about players we want in," Rodgers told BBC Radio Scotland.
"Of course we want quality players but there’s still improvement in this squad, this team, lots of young players so we’ll continue to work with and improve them.
"I love my life here. Despite all reports, there’s talk of ultimatums with the board, I don’t work that way, my communication is very open, so that’s certainly not the case.
"And I’d read somewhere else about walking away.
"I’ve got three years left on my contract here and I love every day of my life at Celtic.
"All I want is for us to improve every aspect of the club. It’s a disappointing result for us. We’d a good performance in midweek and drew, but you move on in football very quickly."News Now - Sport News