Celtic have had their fair share of transfer successes and flops over the years with the Parkhead club struggling to truly nail down some consistency in the market.

Indeed, one signing the club had a nightmare with was central midfielder Ismaila Soro, who arrived from Bnei Yehuda in the January transfer window of 2020.

Neil Lennon reportedly paid a fee in the region of £2m to sign the diminutive Ivorian and the player compared his style to that of a Premier League star, saying: "If you're looking for someone I model myself on, or who I really like as a player, then it's N'Golo Kante.

"I watch nearly all of his games and he's a top player in that position. His level is really something I want to achieve, if I can."

He enjoyed a promising start to life in Glasgow as he played 19 matches and averaged a SofaScore rating of 6.92 in the second half of the 2020/21 Premiership campaign. The enforcer made 3.1 tackles and interceptions per game whilst winning 52% of his individual duels, which shows that he was winning the ball back for his side on a consistent basis.

Soro followed that up by struggling badly in the 2021/22 season. He averaged a dismal SofaScore rating of 6.59 in eight Premiership appearances - making 1.0 tackles and interceptions per match - and a score of 6.60 in two outings in the Europa League.

These statistics show that his performance levels dipped considerably and that meant he struggled to get near the team under Ange Postecoglou, who replaced Lennon in the summer of 2021.

This led to the Australian manager deciding to sanction a loan exit for Soro as he joined Portuguese side Arouca until the end of the 2022/23 campaign.

He has endured a rough time out on loan as he has averaged a dismal SofaScore rating of 6.25 across 11 appearances in Liga Portugal, making 2.0 tackles and interceptions per match and losing 69% of his individual battles.

At the time of writing, Transfermarkt values Soro at just €500k (£435k), meaning his value has plummeted by roughly 78% since he joined Celtic in January 2020.

The midfielder is under contract with the Hoops until the summer of 2024 but his form in Portugal does not suggest that he is set to come back and impress enough to force his way back into Postecoglou's thinking for next season.

Celtic have had a nightmare with the 24-year-old as his value has dropped significantly since arriving at the club and his performance levels have not been good enough to make him a regular in the team.