The French best mates squared off Arsenal's Europa League clash with Atletico on Thursday night.
And both were on the score-sheet in the first leg showdown before swapping shirts at the end.
Griezmann and Lacazette exchanged jerseys and a laugh on the pitch at the end of the 1-1 draw.
French forwards Griezmann and Lacazette are best friends and even went on holiday together to Los Angeles.
Before the Europa League semi-final, Lacazette spoke of his close friendship with the Atletico forward.
He told Arsenal's official website: "Griezzy is a very good player who I met nearly 10 years ago now.
"We developed a strong bond and we see each other every year, either on national duty or elsewhere. We get on really well.
PATHETICO Arsenal 1 Atletico Madrid 1: Antoine Griezmann cancels Alexandre Lacazette goal in Europa League semi-final stalemate
"You can't really explain why you get on well with someone, it's instinctive. Perhaps we share the same values and the same jokes.
"We laugh a lot. We like to, quote-unquote, poke fun at people but always respectfully and in a kind manner. We are both jokers."
Both forwards were on target as Arsenal blew a number of chances to put 10-man Atletico Madrid to the sword.
Sime Vrsaljko was shown two yellow cards within the first ten minutes and manager Diego Simeone was also sent off as Arsenal had a dream start in Arsene Wenger's final European home game at the Emirates.
But despite dominating possession – the Gunners had 76 per cent of the ball – Arsenal could not take capitalise on their numerical advantage.
Arsenal also had a massive 28 shots at goal, with Atletico keeper Jan Oblak in fine form.
Lacazette finally broke the deadlock, heading in a Jack Wilshere cross, to send Arsenal fans bouncing.
But after a mistake by Laurent Koscielny – and then a slip by Shkodran Mustafi – Griezmann was able to smash home from close range to score a vital away goal.
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