The Professional Footballers Association (PFA) said "violence towards players is completely unacceptable" after a fan appeared to aim a kick at Arsenal goalkeeper Aaron Ramsdale following their derby win over Tottenham.
Following the Gunners' 2-0 victory at Tottenham Hotspur Stadium, a spectator climbed over the hoardings and aimed a kick towards the England international.
The PFA has stated such problems are a "priority issue" in response, calling for players to be protected.
"Violence towards players is completely unacceptable. These types of incidents are occurring too often," a statement read.
"Players have a right to be safe in their place of work. When a player is attacked we expect the laws and regulations that are in place to protect them to be properly enforced.
"As the players' union we treat this as a priority issue. We will be continuing to work with the authorities to demand that players and staff are better protected in their place of work."