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.