Southampton could not live with Spurs after Ryan Sessegnon cancelled out a James Ward-Prowse strike earlier on in the game.
Eric Dier, who had not scored in the last three years, gave Antonio Conte’s men the lead before Emerson Royal forced Mohammed Salisu to put through his own net.
Kulusevski then wrapped up what he started with a goal of his own to give Spurs all three points and send out a strong message to rivals.
We have to dream on and why not?
Tottenham manager Antonio Conte who was visibly delighted with the response from his team after going a goal down early and three points joked that why not when asked about winning the league this season.
He told the press: “Why not winning the Champions League and the Premier League?.
Last season Tottenham kept five clean sheets from their last six games and powered on to finish fourth in the league table, securing that prestigious Champions League spot despite trailing Arsenal for large parts it.
That late surge in form meant they will now be playing in the Champions League, the club’s first in the last three seasons and they responded to that challenge by bringing in six new players to add competition and numbers to the squad.