Manchester United are closing in on the signing of Borussia Dortmund's Henrikh Mkhitaryan after making an "improved offer" for the midfielder, the Bundesliga club's CEO Hans-Joachim Watzke has said.

The Armenia international has been linked by British media with a move to Old Trafford under new manager Jose Mourinho.

"The situation is now different. Manchester have made a much improved offer," Watzke told Sport Bild magazine.

"In situations like this there are always a lot of different things to consider and in the end at one point we have to make a decision.

"As we are back in training on Monday we will decide at the weekend. I have contacted the relevant people and we will weigh things up …then the board will make the decision."

The 27-year-old scored 11 goals in 31 league games as Dortmund finished second last season and could be Mourinho's second signing at United after defender Eric Bailly's arrival from Villarreal.