Born in Kumasi, Ghana, Abubakar had a successful trial with Willem II in the summer of 2015, but he had to wait to the following year to sign a contract due to work permit problems.
He eventually received a Portuguese passport as his father had been working in the nation for several years,[1][2] and on 2 March 2016 he committed to the Dutch club on a short-term deal.
[3] On 2 April 2016, whilst still a junior, Abubakar made his senior debut, coming on as a late substitute in a 2–3 Eredivisie home loss against FC Twente.
[20] On 16 June 2016, he was selected for a 23-man preliminary list for the 2016 UEFA European Under-19 Championship[21] and also made the final squad, scoring in a 4–3 group stage win over the hosts Germany.
[22] Shortly after, however, after doubts arose regarding his eligibility, the Portuguese Football Federation opted to immediately remove him from the competition pending further approval.