Atletico Madrid winger Thomas Lemar has not lived up to expectations at the club, according to head coach Diego Simeone.
The 24-year-old, who joined in a €70 million (£60m/$78m) deal from Monaco in July 2018, has struggled for consistent form in La Liga.
The France international has been heavily linked with a possible move to Arsenal this month, although a hamstring injury could complicate any potential mid-season transfer.
Editors' Picks
Speaking ahead of Saturday's league meeting with Levante, Simeone did not state whether Lemar could be allowed to leave in the January window but did admit the player's performances have been something of a disappointment.