German keeper Karius, 25, has spent this season on loan at Turkish club Besiktas and has a year left on his deal.
On Sunday, he seemed to commit his future to the Istanbul-based side for next season, saying he was keen to stay.
But on Tuesday, Karius’s girlfriend, Sophia Thomalla, shared a picture of her car with “LOSER” spray-painted along the side in white paint.
Sharing the picture, the 29-year-old German model fumed sarcastically: “Great”.
Karius has endured an up-and-down season since last year’s Champions League horror show.
Sophia Thomalla, girlfriend, Loris Karius
He made two shocking mistakes for Liverpool during the Champions League final against Real Madrid, gifting Karim Benzema the opening goal after throwing the ball to his feet, before fumbling Gareth Bale’s long-range effort.
The young goalie has tried to rebuild his career in Turkey’s Super Lig after the arrival of Brazilian shot-stopper Alisson at Anfield for £67m last year saw him shipped out to Besiktas.
But it appears his decision to commit to the Turkish side hasn’t gone down well with fans.
In March, it was reported he was considering suing the club for unpaid wages, while Besiktas coach Senol Gunes slammed him for going “a bit stagnant” and lacking “motivation” and “enthusiasm” after a number of mistakes.
On Sunday, however, Karius shared an Instagram post in which he appeared to commit his future to his loan club.
He wrote: “Thank you for your whole support on and off the pitch and for welcoming me to your famous and wonderful Besiktas family.”
Karius started dating his new girlfriend, the German model and actress Sophia, towards the end of last year.
A former star on Germany’s Next Top Model, she has racked up hundreds of thousands of followers for her stunning snaps and distinctive tattoos.
She used to date Brit rocker Gavin Rossdale, former spouse of Gwen Stefani.
Before that, she dated Till Lindemann, the lead singer of German heavy metal group Rammstein.
She was also married to Norwegian heavy metal star Andy LaPlegua in 2016 — but the pair split after just a year.
Last June, Daily Star Online reported Karius had been dumped by his former girlfriend, Made in Chelsea babe Ianthe Rose, following his shocking display in the Champions League final for Liverpool.