Forget cards and fruit baskets ... Jake Paul just thanked a mogul in Dubai for letting him use his gym this month with a way better gift -- a Man City jersey personally signed by superstar Erling Haaland!!
The YouTuber-turned-boxer brought the "thank you" present out to Umar Kamani at The Kamani Club this week ... after the PrettyLittleThing founder opened up his gym's doors to allow the 6-0 boxer to train for this weekend's Tommy Fury fight.
TMZ Sports has learned ... Paul got the No. 9, blue jersey signed by Haaland himself -- before framing it and handing it over to Kamani.
Of course, the gift was super meaningful -- as Kamani is known to be a huge Man City fan.
The 34-year-old appreciated the gift ... thanking Paul and wishing him good luck against Fury in a social media post.
"A great camp from #TeamPaul at @thekamaniclub over the last few weeks," the post read, "wishing you the best of luck in your upcoming fight."
Paul's sights are now squarely on Fury -- as the two will finally fight each other on Sunday in Riyadh.