Kilmarnock fans toast victory over Celtic.
Youssouf Mulumbu made his Celtic debut at the weekend against his former club.
It did not end well for him, with Kilmarnock coming from behind to win 2-1.
Mulumbu looked below par compared to his performances for Killie last season and was outshone by former teammate Aaron Tshibola, who is back at the club on loan.
Mulumbu tweeted after the game, expressing his disappointment at the result.
Kilmarnock wanted to keep Mulumbu in the summer and re-sign him.
He chose to explore his options elsewhere, eventually signing with Celtic as a free agent.
Kilmarnock fans did not approve of this decision, and were glad that it did not pay off early for the midfielder, who tasted defeat on his return to Rugby Park.
Here is a look at how they responded to Mulumbu’s message.
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