Athletic Club have released a statement regarding Nico Williams' fitness. The Basque side confirmed that the player has suffered "a moderate muscle injury to his left adductor". While no timeframe for his return has been given, it is expected that the Spanish international will miss the team's upcoming fixtures, including their Champions League debut against Arsenal.
Nico Williams' injury was the sour note in Spain's emphatic 6-0 victory over Turkey. The international winger had to be substituted due to a problem with his left adductor, raising concerns at Athletic Club, who have made a flying start to La Liga and are eagerly anticipating their return to the Champions League.
Upon his return to Lezama on Monday, the player underwent a medical examination by the Basque club's medical staff, and the news isn't particularly encouraging.
According to a statement released by the club, Nico Williams has sustained a moderate muscle injury to his left adductor muscle, and his availability for the team is "subject to evolution" - a common phrase used by clubs when they don't want to provide an estimated recovery time.
However, according to 'Marca', the player could be sidelined for up to six weeks in the worst-case scenario, although the timeframe could be shorter depending on the player's progress.
Based on this information, it's logical to assume that the player will, at the very least, be unavailable for this weekend's league match against Alavés, and he will also certainly miss the clash against Arsenal (in their Champions League opener) and the following week's La Liga match against Valencia.