Players who took part in the Enough campaign for a 24-hour social media boycott in protest at online racial abuse received further insults in response to their posts, the Professional Footballers’ Association has reported.

The union intended to display a show of solidarity with members who have been targeted, as well as a demand to social media companies and the game’s authorities that more needs to be done.

Following the boycott, which started at 9am BST on Friday and had been backed by professionals throughout the English game, social media platforms issued responses to highlight their efforts to combat abuse. Nevertheless, the PFA said on Saturday there had been more abuse directed at some of those involved in supporting the campaign.

“Some members received racist abuse on their Enough posts. When these incidents were reported, the response from social networks was – again – unacceptable,” the players’ union said on Twitter. “In the coming days, we will be inviting players to report any racist abuse they have received to us. We will collate it and share it with social platforms to demonstrate the impact of their lack of action.

“We will be requesting meetings with each of the social platforms as a matter of priority. Meetings with the FA and government are planned for next month. This is a first step in a larger player-led campaign to demand meaningful change.”

Manchester United’s Chris Smalling was one of the players to give his backing to the campaign after he was abused on Twitter following his side’s Champions League defeat in Barcelona this week. Smalling joins a growing list of players – Mohamed Salah, Danny Welbeck, Wilfried Zaha and Raheem Sterling among others – who have received abuse.

Following a spate of abuse aimed at players on social media and in and around grounds, concern is mounting over racism. During the Euro 2020 qualifier in Montenegro last month, England’s black players were subjected to repeated chants, while the Tottenham defender Danny Rose said recently he has had enough of racist abuse and was ready to quit the game.