Get up to date on Arsenal transfer news, injury updates, fixtures, not restricting reports on Arsenal Ladies and share your opinions on Goonerhead
Sanchez is expected to arrive at Old Trafford within the next 48 hours and could even make his debut at Burnley this weekend.
United will pay £25m cash to Arsenal and include Mkhitaryan as part of the deal.
They will then hand Sanchez a huge signing-on fee of £25m while agent Fernando Felicevich will bank £5m.
Arsenal, meanwhile, are already starting to prepare for life without the Chilean sensation.
They are closing in on a deal for Mkhitaryan while reports today surfaced that Pierre-Emerick Aubameyang has agreed personal terms with the Gunners.
Jose Mourinho admitted on Monday night that his side “have a chance” to sign Alexis Sanchezin this window, with previous suitors Manchester City understood to have now exited the race for the 29-year-old due to the cost involved.