Barcelona and Brazil legend Ronaldinho signs referee's yellow card

Admittedly, it's becoming increasingly difficult to track Ronaldinho's movements as he continues to wind down his career, but we can confirm the legendary forward was sighted most recently pitching up for a guest appearance in Ecuador.

Indeed, the 35-year-old agreed to take part in a special one-off game for Ecuadorian top flight side Barcelona in a money-spinning friendly against San Martin on Friday evening.

During a break in the game, the referee seized his once-in-a-lifetime opportunity to ask Ronaldinho for his autograph.

However, stuck without a piece of paper, the official had the Brazilian superstar sign the only suitable thing he had to hand -- his yellow card!

Now there really is something you don't see everyday.