Harry Kane sustained an ankle injury in the FA Cup match against Millwall and will have a scan come Monday.
The South Korean made it six goals in four FA Cup games this season and he even set up fellow forward Vincent Janssen to end a seven-month wait for a goal from open play since joining Tottenham.
Spurs' talismanic striker limped off down the tunnel and was replaced in the formation by Christian Eriksen, with hat trick hero Son Heung-Min moving up to be the primary striker.
Alli tapped in Eriksen's cross for the fourth in the 72nd minute and Janssen made it five seven minutes later with his first goal from open play for Spurs since signing previous year.
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Son Heung-min stepped up and fired home a hat-trick as Spurs saw off their League One opponents 6-0 at White Hart Lane which is the type of performance required if the team wants to continue winning while Kane is sidelined.
The bit about it looking "similar to Sunderland" is the most alarming thing about Pochettino's statement, but that's because after his ankle injury against Sunderland Kane missed eight weeks.
Janssen has started 13 of those encounters, scoring five goals for the club during that time and supplying three assists.
"This could be a turning point for Vincent and Son can play like a striker".
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"I didn't hear anything but myself and the club, we won't condone that if there is. Of course I am sad about Harry's injury but now I try to find solutions and try to find which is the best player to replace him".
Kane only lasted 10 minutes after twisting the same right ankle he injured in September and kept him out for 10 games.
Making a perfectly-timed run onto Kieran Trippier's pass, Son got in behind the Millwall defence in the 54th minute and volleyed a fine finish past King.
Millwall manager Neil Harris was asked in the post-match news conference about such chants being racially offensive Asian stereotypes.
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His plight brought sympathy from his team mate Dele Alli, who told the BBC: "It is always frightful to lose a player like Harry.We wish him a speedy recovery". I'm sure it will be investigated - we just want everyone to enjoy the game.