Arsenal signed Mika Biereth from Fulham in 2021, but the 22-year-old never made a senior appearance during his three years at the Emirates. Instead, he spent time on loan at RKC Waalwijk in the Netherlands, Motherwell in Scotland, and eventually Sturm Graz in Austria.
Last year, Arsenal opted to sell Biereth to Sturm Graz permanently. However, after finding his form, AS Monaco took a chance on him in January, signing the Denmark youth international in a €15m (£12.4m) deal.
Since joining Monaco, Biereth has been in sensational form, scoring 10 goals in his first 10 matches across all competitions, including three hat-tricks.
Monaco recently mocked Arsenal for letting Biereth go, and former Manchester United defender Paul Parker has now labeled it the worst transfer mistake of the last decade.
“I think Arsenal made a crazy decision selling Mika Biereth,” Parker told SpilXperten. “They barely got any money for him.
“We’ll never know how he would have developed if he had stayed, but based on his performances at Monaco, it looks like the mistake of the decade.
“I’ve watched a lot of Monaco’s games and all of his goals. He’s an excellent finisher—exactly what Arsenal is missing.
“They’re struggling with injuries, but even with a fully fit squad, I believe Biereth would have been their best striker. Right now, they have a group of ineffective forwards, and they’ve even tried using Mikel Merino up front, which feels like an admission of failure.
“I’ve known about Biereth for a while—he was highly regarded at Fulham. It’s clear he made the right choice because he’s now one of Europe’s most dangerous strikers. But I’m sure he must have been frustrated that he never got his chance at Arsenal.
“The fans had high hopes for him and were disappointed when he was sold. Some might argue Ligue 1 isn’t as strong as the Premier League, but scoring goals at this rate in France isn’t easy.
“I’m excited to follow his progress because I believe he’ll soon be one of the most sought-after strikers in the world. Every club wants a goal scorer, and big teams are always on the lookout.
“He’s going to be very expensive in the future, which means Arsenal’s decision to sell him will turn out to be a costly mistake.”