Manchester United have announced they have agreed a deal to sign Swansea winger Daniel James.

United will pay Swansea £18m, including add-ons, for the 21-year-old Wales international, it's understood.

"Manchester United is delighted to announce that it has agreed, in principle, terms with both Swansea and Daniel James for his transfer to the club," a statement on the Premier League side's official website read.

"Daniel has successfully completed a medical at the Aon Training Complex. Further details will be communicated once the international transfer window opens next week."

Swansea also announced that all parties had agreed for James to become Ole Gunnar Solskjaer's first signing as United manager.

"Swansea City can confirm the club has agreed transfer terms with Manchester United for winger Daniel James," the club said on their official website.

"The Premier League club has also agreed personal terms with James, 21, following a successful medical at Old Trafford.

"The transfer is expected to be completed when FIFA's international transfer window opens from 11 June. The club will make further comment once the transfer has been completed."