After month-long talks, the 21-year-old Argentine will undergo his medical before signing a long-term contract to move to Stamford Bridge before deadline day.
It is safe to say the Argentine has not endeared himself to the United fanbase with his antics in looking force a move away though.
Diogo Dalot has not minced his words when it comes to assessing his team's performance against Grimsby.
The Clarets do not have a good Premier League record against the Red Devils but Saturday could be a great chance to rectify that.
Burnley won their first ever Premier League game against Man United, with Robbie Blake's stunning volley securing a memorable 1-0 win at Turf Moor in August 2009.