Tottenham have revealed that striker Harry Kane suffered a tear in his left hamstring in the 1-0 defeat to Southampton on New Years’ Day.
The England skipper limped off during Wednesday’s match, although Spurs have not announced how long they expect to be without him for.
A statement on the club’s website read: “Following assessment today [Friday], we can confirm that Harry Kane suffered a tear in his left hamstring during our New Year’s Day fixture against Southampton.
“Our medical staff will continue to review the injury with treatment ongoing.”
Boss Jose Mourinho initially said he was unsure as to the extent of the injury, adding that his initial feeling was “bad news”.
The news comes as a blow to Spurs, leaving Mourinho without many options up top.
Youngster Troy Parrott is one consideration to replace Kane. The 17-year-old has scored six goals in four UEFA Youth League appearances while also making his debut in the Premier League and EFL Cup this season.
Tottenham face Middlesbrough in the third round of the FA Cup on Sunday and speaking to reporters at his pre-match press conference, Mourinho insisted it was “too soon” to say the 17-year-old could come in up top.
“I think too soon” the manager said. “I think one thing is potential and another thing is conditions to express potential and I think he needs time.
“Having minutes, being involved is one thing. Another thing is what you call the direct replacement. To be that he needs to work.
“There are many different processes of a player to develop in some cases the loans are very good. You have the example of Harry Kane or Tammy Abraham.
“In other cases no need of a loan because the development at the parent club is more natural.”
Asked if the injury could change his plans for the January transfer window, Mourinho said: “I come to work with the players that are available and I’m not thinking about the market.
“I think my job is to do what I did today, what I’m going to do tomorrow, which is to work with a small group of players.
“The players playing are permanently recovering but recovering is not enough. If you look at the number of injuries to Premier League players in the past two weeks, you realise recovering is not enough.
“The most protected players belong to the squads with so many solutions that there is space for rotation. I don’t want to think about it.
“Of course the market is open until the end of January. Everybody in the club wants to give the teams the best conditions but at the same time the world doesn’t end at the end of this season.”
Tottenham follow up their FA Cup third round tie with a crunch match against Liverpool in the Premier League next weekend.