CHELSEA fans were left baffled by West Ham's trolling of Cole Palmer - in which they referenced one of their fringe players.
The travelling Hammers supporters mocked the England international after he blazed a shot over the bar in Monday night's London derby.
Sections of the travelling supporters chanted "You're just a s*** Andy Irving!" after Palmer's effort flew high over the bar.
The chant was in reference to West Ham's Scotland international Irving, who was given a surprise start at Stamford Bridge.
And to say Blues fans were perplexed by the insult would be an understatement.
One of the Stamford Bridge faithful wrote on X: "I can't stress enough that I mean no disrespect whatsoever - but who is Andy Irving?"
Another said: "I have no idea who this Andy Irving is."
And another said: "Who is Andy Irving and why is every chant from the away end about him?"
One remarked: "I’m not even being sarcastic here. Who the f**k is Andy Irving?"
Another chimed in: "Andy Irving is the football player whose existence confuses me the most.
"Where has a 24-year-old Scottish midfielder who I've never heard of come from, now playing at Stamford Bridge for West Ham?"
Irving's start at the Bridge marked only his tenth appearance for West Ham since he joined the East Londoners in the summer of 2023.
Hammers boss Graham Potter was full of praise for the Scot, saying: “His spirit and his application and I think his training performances have merited that start.
"Obviously, we lost Edson Alvarez quite late [to injury] so we had to adjust.
"I think the decision was clear for Andy because he's trained really well and I think it's important for the group to know that. I'm pleased with him.”
West Ham signed Irving in the summer of 2023, but he remained on loan at SK Austria Klagenfurt for the season
The strange part of the deal was that there was no official announcement of the transfer
It was only when he arrived for pre-season last summer that he did enough to convince now-sacked manager Julen Lopetegui that he was worthy of a spot in the squad for the season.
Chelsea ran out 2-1 winners in the London derby, with a Pedro Neto strike and an own goal from Aaron Wan-Bissaka moving them above Manchester City into fourth place.