Even Dier knows this one is pretty funny... just watch for his laugh!
There have been quite a few battles in the Premier League this season, from Jose Mourinho and Arsene Wenger to Aston Villa and actually winning games.
Over the past few weeks, the pair have been trying to get one over on each other and we're not entirely sure who exactly is winning at the moment!
Alli shared a video of Dier's dodgy dance moves and Dier hit back by revealing Alli's great cover of Sandi Thom's 'Wish I was a punk rocker'.
And after a brilliant interview between the two on Spurs TV the other day, Alli has stuck the knife in with another video put out to try and embarrass his team-mate.
This time, Dier is in the gym doing some boxing work and even he thinks that it's hilarious!
That laugh at the end by Dier... it's almost like he knew exactly where that video was going as soon as it was filmed. I honestly don't think we're ever going to get tired of these two and their antics!