The Premier League will introduce enhanced safety measures to prevent crowd misbehaviour ahead of the start of next season, with clubs unanimously agreeing that visiting teams will provide additional stewards for away matches.
Aston Villa's Swedish goalkeeper Robin Olsen was attacked as Manchester City fans celebrated their Premier League title win by invading the pitch at the Etihad Stadium last month.
Everton fans invaded the pitch at Goodison Park following Dominic Calvert-Lewin's late winner and at the final whistle of their 3-2 victory over Crystal Palace, which secured their spot in the top flight.