Is there a more fierce and competitive rivalry in world football than the Old Firm derby?
If you didn't manage to catch the ever-entertaining clash, the Scottish giants met once again on Saturday afternoon as second half goals from Tom Rogic and Leigh Griffiths gave Brendan Rodgers' side a well deserved victory at Ibrox.
Scott Brown rallied his men to victory in another Celtic onslaught, but as we've seen in years gone by, the Old Firm was filled with controversy.
The previously mentioned Scott Brown was unsurprisingly involved in an altercation with Rangers manager Pedro Caixinha as the teams left for half-time, but another incident involving goalscorer Leigh Griffiths has caused a bigger stir.
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Moments before taking the set piece, cameras caught Griffiths picking a winner and then wiping it on the Ibrox corner flag.
So if by a matter of coincidence you manage to find that particular flag, a 27-year-old's bugger might be sprawled all over the Rangers crest.
Here's more evidence that Griffiths clearly disposed of his nose waste on the Ibrox corner flag:
The Scotland international's actions certainly caused a stir on social media. Here's how Twitter reacted to arguably the most controversial moment of the derby:
The Old Firm never disappoints when it comes to controversy.
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Thoughts on Griffiths' actions during Saturday's clash between Celtic and Rangers?
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