Marcos Rojo will return to Sporting CP training today.
Rojo had gone AWOL last week after being frustrated over Sporting's asking price during transfer talks with Manchester United.
The Argentina defender was dropped from Sporting's first team for his behaviour, but he has since apologised and will return to training today.
"It was all a misunderstanding, I was hot-headed and did not think. I'm sorry, I feel that I was unprofessional and I will correct the situation," said Rojo.
"Tomorrow I train with the first team and with my colleagues, that is what I want to do.
"Sporting trusted me when my career was not in the best time. They gave me the opportunity to play for a big team in Europe."
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