The image showed Tottenham footballer Emmanuel Adebayor saluting manager Tim Sherwood after he had scored a goal during Tottenham's 5-1 defeat of Sunderland.
But the Mail - unlike The Guardian and the Daily Telegraph - deleted the man standing next to Sherwood, a member of Spurs' coaching squad, Chris Ramsey.
A spokesman for the Daily Mail quoted by Press Gazette said it was not the paper's policy to manipulate news images and that it had been a "mistake". An internal investigation is underway.
The original picture was taken by Kirsty Wigglesworth and distributed to newspapers by Associated Press, which prohibits digital manipulation of its photographs.
The Daily Mirror also ran the image, choosing to obliterate Ramsey with a headline.
Source: Press Gazette