Ivana Knoll -- AKA "The World Cup's Hottest Fan" -- is on the mend after breaking her leg this weekend ... but don't worry, she's still dropping sexy thirst traps on the 'Gram!!
The Croatian model and DJ tells TMZ Sports -- the injury happened as she was leaving a small nightclub in Old Town Mykonos on Saturday ... when she walked on a "very bad floor" and twisted her leg while wearing tight boot heels.
Knoll says she was in a world of pain, but toughed it out and walked to her car to drive home .