• Armenian midfielder had one year left on his contract at Borussia Dortmund.
  • Watzke confirmed Manchester United made an exceptionally generous offer for their midfielder.
  • Mkhitaryan is set to become Jose Mourinho's third signing of this summer.

Borussia Dortmund have confirmed Henrikh Mkhitaryan will join Manchester United in the summer transfer window. The Bundesliga outfit have accepted a bid from the Red Devils, which will see the star midfielder swap Signal Iduna Park for Old Trafford.

A statement on Dortmund's official website read, "Borussia Dortmund and midfielder Henrikh Mkhitaryan (27) will part ways this summer. After intensive discussions, BVB have agreed to honour the Armenian national team player's wish to depart for Manchester United, who finished fifth in last year's Premier League table.

"Borussia Dortmund wishes Henrikh Mkhitaryan every success for the coming season, in both the Premier League as well as in the UEFA Europa League."

The Armenian international had one year left on his contract with the German side. According to The Telegraph, the bid accepted by Dortmund is believed to be in the £26m ($34.5m) region as they look to cash in on the player, rather than letting him go on a free next summer.

Dortmund chief executive officer Hans-Joachim Watzke said that it was hard for his side to part ways with Mkhitaryan, who has been one of the standout players for them in the 2015/16 season. He admitted that United made an "exceptionally generous offer", which convinced them to part ways with the midfielder.

"The decision to go ahead with this transfer was a very difficult one due to the unique negotiating position we found ourselves in: Manchester had made us an exceptionally generous offer," Dortmund's official website quoted Watzke as saying.

"If we had not taken them up on it, then the player would have gone a year later in 2017 on a free transfer. And we would have only delayed answering the question over the player by one year."

Mkhitaryan is set to become Jose Mourinho's third signing of this summer. United have already completed deals for Eric Bailly and Zlatan Ibrahimovic as the 20-time English champions look to bounce back in the upcoming campaign after they failed to finish in top four last term.