Rivalries were put to one side before and after Arsenal's 1-0 win over Chelsea.
Well, certainly between Blues head coach Thomas Tuchel and Gunners captain Pierre-Emerick Aubameyang as the pair were reunited ahead of kick-off at Stamford Bridge.
Having worked together at Borussia Dortmund they were very happy to see each other as the Sky Sports cameras picked up on them sharing an embrace by the side of the pitch.
This wouldn't have come as much of a surprise as Aubameyang enjoyed a fruitful spell at Dortmund whilst under Tuchel's guidance and has previously hailed the Chelsea head coach's qualities.
"He is one of the best coaches I have ever had, I cannot deny his talent," Aubameyang told SFR Sport back in 2018.
"He could be a good fit with PSG, but if he goes on the adventure, we’ll have to see how he keeps the changing room together, I think that’s the hardest thing at a big club.
"He is a bit crazy, just like me."
But once the game started, Aubameyang played a key role in denying his former manager all three points in the London derby as he claimed the assist for Emile Smith Rowe's only goal of the game.
As a result, the Gunners have managed to complete a famous league double over the Blues for the first time since the 2003/04 campaign.
Although, the result had no impact on Aubameyang and Tuchel's relationship.
As spotted by Goal, the pair continued their pre-match catch-up following the final whistle at Stamford Bridge and after all the post-match media duties had been completed.
Arsenal's Mikel Arteta was, as expected, the happier of the two managers after the game as he praised his side's defensive resilience after being dominated for large spells.
"Yeah it’s been 10 years I think since we won here," he said in the press conference. "It’s a really important result for the club for our fans and as well for our players because I think they showed how much they mean it.
"The spirit and the attitude among the group and how much they care about it."
