Arsenal boss Arsene Wenger is reportedly facing a battle to convince Alexis Sanchez to sign a new contract at the Emirates.
The Chilean international, who has two years to run on his existing deal, joined Arsenal from Barcelona in the summer of 2014 and struck 25 goals in 52 appearances during his first season in England.
The former Udinese forward has 16 goals this season, but his form in the second half of the campaign has been questioned.
According to The Telegraph, after being substituted against Norwich City last weekend, the 27-year-old headed straight down the tunnel and left the stadium, leaving Wenger unimpressed.
The same report claims that Sanchez is now seriously considering the possibility of leaving Arsenal at the end of the season as the attacker targets silverware.
