HARRY Kane celebrated his 99th Premier League goal, but Tottenham a 1-1 draw against Southampton could rule Spurs out of a Champions League place.
The result moves Spurs to within two points of fourth-placed Liverpool, who have a game in hand against last-placed Swansea, but it was not enough to lift Southampton out of the relegation zone.
Kane's goal was his ninth in his past five Premier League starts and he is now just a goal away from becoming the 27th member of the 100 club.
Disappointed Spurs boss Mauricio Pochettino said his side could rue the dropped points at the end of the season, with a tough run of fixtures coming up.
Spurs next three Premier League games are against Manchester United, Arsenal and Liverpool.
"You must give credit to the opponent, but I am not happy with our performance," he said.
"We needed to move the ball quicker and create more. We made a lot of mistakes.
"It is temporary that Southampton are in the relegation zone, for sure they will push up the table.
"It is two points we are going to miss at the end of the season because it is so tough between six or seven teams."
Mauricio Pellegrino's Southhampton had not won in the league since November and dropped into the relegation zone this weekend.
Fans are growing impatient that none of the £75 million Liverpool paid for Virgil Van Dijk has yet been invested, with just 10 days left of the transfer window.
Flu struck both teams in the build-up, with Southampton missing Shane Long and Tottenham without Hugo Lloris and Christian Eriksen.
Southampton took a deserved lead in the 15th minute when Sanchez deflected past his own goalkeeper Michel Vorm after being tempted by Ryan Bertrand's low cross from the left.
Spurs almost levelled two minutes later when Ben Davies's corner eventually dropped to Eric Dier and he shot low against the right post.
But Kane moved on to 99 goals in the Premier League as he headed in Davies's next corner, beating two Southampton defenders to the ball to score from close range just 197 seconds after Sanchez's own goal.
Both teams continued to press, making for an attractive game in appalling conditions.
Kane was then a whisker away from reaching the century milestone as he shot inches wide of the far post in the closing stages.
Update your news preferences and get the latest news delivered to your inbox.