The Everton midfielder was given a warm ovation from his Everton teammates after issuing an explanation for his shocking red card during the recent victory at Old Trafford.
Gueye earned the distinction of being the first Premier League player to be sent off for striking a fellow player in 17 years when he slapped his defensive colleague during the match. The Toffees' display was remarkable as they played with a man down for the majority of the game, including stoppage time, to achieve David Moyes' first win at Old Trafford as a away coach in multiple tries.
'My first apology goes to Michael Keane,' he wrote on social media. 'I take full responsibility for my reaction.'
The Senegalese international was unable to secure an opportunity to converse with the manager or his colleagues at the interval. Afterwards, with the away dressing room celebrating after the 1-0 win, the 36-year-old requested to speak to the whole team and the defender specifically.
Gueye may yet be disciplined by Everton despite the manager's admission that he likes his team members fighting with each other. The Scot has a regular punishment process for red and yellow cards, including financial penalties, which is likely to be implemented in Gueye's case.
The Merseyside club may find themselves without their influential player until the new year. The Senegalese international will serve a three-game suspension against Newcastle, Bournemouth and Forest but might be selected for AFCON responsibilities by Senegal before he can return to play against Chelsea on 13 December.
'Passions can sometimes overflow,' he added. 'But nothing justifies such behaviour.'
Meanwhile, Mathijs de Ligt accused United of lacking urgency in the recent defeat, which ended their unbeaten run at multiple matches.
United head to Crystal Palace for the weekend lunchtime start. 'Our upcoming match is absolutely crucial,' said the defender. 'We have to bounce back from this performance.'
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