Tottenham manager Mauricio Pochettino has confirmed that midfielder Dele Alli will be out for a "few weeks" after picking up a knee injury in training.
The England international was not named in the Spurs squad for the north London derby with Arsenal and ahead of the game coach Pochettino explained his absence.
"Bad luck yesterday in the training session, he twisted his knee. We need to assess him today and tomorrow," he told Tottenham's official website.
"He'll be out for a few weeks. We hope it's not a big issue. It's bad luck. He was in the team. He's an important player but that's football."
Alli's injury also means he will be unavailable for international duty with Gareth Southgate set to name his England squad following Sunday's Premier League games.
The Three Lions take on Scotland in a World Cup qualifier at Wembley on Friday before facing Spain in a friendly four days later.