Harry Kane has condemned the "vile racist abuse" Bukayo Saka, Marcus Rashford and Jadon Sancho received after the Euro 2020 final.
The three England players missed penalties in a 3-2 shoot-out defeat to Italy following a 1-1 draw at Wembley on Sunday.
Saka's spot-kick, saved by Gianluigi Donnarumma, was decisive, while Rashford and Sancho were introduced in the closing minutes of extra time in order to boost England's shoot-out hopes.
The trio have subsequently been the subject of racist abuse on social media, prompting an angry response from the Football Association and manager Gareth Southgate.
Teenaged team-mate Jude Bellingham said the abuse was "hurtful but not surprising", and England captain Kane has now responded.
"Three lads who were brilliant all summer had the courage to step up & take a pen when the stakes were high," he wrote on Twitter.
"They deserve support & backing not the vile racist abuse they've had since last night.
"If you abuse anyone on social media you're not an @England fan and we don't want you."
Kane's tweet was followed up by a post from his England team-mate Tyrone Mings, who responded to an earlier comment on the situation by UK Home Secretary Priti Patel.
"I am disgusted that England players who have given so much for our country this summer have been subject to vile racist abuse on social media," Patel tweeted earlier on Monday. "It has no place in our country and I back the police to hold those responsible accountable."
Prior to the Euros, the Home Secretary had refused to condemn supporters who booed the England team's choice to take the knee prior to kick-off, suggesting the players were "participating in gesture politics" in an interview with GB News.
"You don't get to stoke the fire at the beginning of the tournament by labelling our anti-racism message as 'Gesture Politics' and then pretend to be disgusted when the very thing we're campaigning against, happens," Mings tweeted in response.
Channel 4 revealed research showed close to 2,000 abusive tweets targeting Rashford, Sancho, Saka and Raheem Sterling had been posted following Sunday's game – with 167 considered "high risk" – according to data company Signify, who are working with the Professional Footballers Association (PFA).
"I'm still struggling to find the words to express my emotions from the past month," Mings wrote in another tweet.
"I'm so proud of everyone who has contributed to the joy and togetherness this team has bought to millions. We have celebrated, smiled, cried and cheered together & for that, I’m so, so proud.
"But waking up today and seeing my brothers being racially abused for being brave enough to put themselves in a position to help this country, is something that sickens, but doesn’t surprise me.
"We have literally made history. We've gone where no one else has gone. Take that in."