Brazilian World Cup winner Ronaldinho signed the shirt of a fan who interrupted a Mexican league match to get an autograph.
The youngster ran towards the forward, 34, wearing a Brazil top and holding a pen, and the referee stopped play.
Having begrudgingly obliged, Ronaldinho went on to net a consolation goal for Queretaro in their 2-1 defeat by Atlas.
Others who have indulged fans include Mario Balotelli and Frank Lampard, who have posed for 'selfies' in games.
Liverpool's Balotelli posed with two fans who ran on to the pitch while he was playing for AC Milan in a friendly against Manchester City in July.
Lampard was snapped in an embrace with an affectionate Manchester City supporter during his side's 7-0 Capital One Cup win over Sheffield Wednesday.
The young fan was escorted from Etihad Stadium by police soon afterwards.
Ronaldinho is playing his first season in the Mexican league, having signed for Queretaro at the beginning of September.
A key part of Brazil's 2002 World Cup-winning team, he scored 33 goals in 97 appearances for his country in a 14-year international career.
Ronaldinho won the Champions League with Barcelona in 2006 and also played in Europe for Paris St-Germain and AC Milan. He won the Ballon d'Or in 2005.