William Gallas believes Mykhaylo Mudryk made a mistake choosing Chelsea over Arsenal.
Gallas played for both London clubs.
He told the London Evening Standard: Perhaps Mudryk made a mistake - he had the opportunity to play for Arsenal.
"Given the way Arsenal are playing, he would suit them and at the end of the season he may regret his choice.
"What if Chelsea doesn't qualify for the Champions League? Arsenal could become champions at the end of the season. Perhaps Mudryk will regret his choice. He could play at a good level and play in the Champions League next season."
