The Real Madrid and Spain striker has become Jose Mourinho’s top summer transfer target, with United confident they will land him.
Sources in Spain have suggested Morata could undergo a medical in Manchester this weekend, with the deal potentially confirmed as early as Monday.
United moved for Morata after Antoine Griezmann decided to stay at Atletico Madrid and with Everton’s Romelu Lukaku, another target, poised to rejoin Premier League champions Chelsea.
That has seen United switch their attention to Morata, who plundered 20 goals for Real last season, despite limited first-team opportunities at the Bernabeu, with Mourinho viewing him as the ideal candidate to lead his attack.
The loss of Zlatan Ibrahimovic to long-term injury and his subsequent release by United has left a void up front which Mourinho believes can be addressed by the signing of Morata.
The 24-year-old forward helped Real to the La Liga and Champions League double last season, despite starting just 16 games in total in both competitions.
Mourinho gave Morata his Real debut in 2010, when he was in charge at the Bernabeu, and has always rated the forward, who is keen to be reunited with his former boss.
Morata joined Juventus in 2014 and his success there persuaded Real to exercise their £25m buy-back clause two years later, although they are ready to let him go again.
The Italian’s mooted move comes as Victor Lindelof is set to seal a £30million switch to Old Trafford.
The Red Devils have reached an agreement with Benfica for the centre-back, who arrived at Carrington on Wednesday for a medical.
Lindelof is understood to have agreed a four-year deal with United, with the option for a further year.
Lindelof has been on international duty for the last 10 days, playing in Sweden’s 2-1 win over France on Friday night.
He sat out the 1-1 friendly draw with Norway on Tuesday evening.
The defender was heavily linked with a move to United in January but they waited to make a move.