The 18-year-old has impressed United fans since stepping up to the first team this season.
Bayern and Atletico duel to become the first side to reach the Champions League final in May.
Pep Guardiola's side targeting comeback at Allianz Arena after first-leg defeat. Find out where to watch the match live in the UK.
Red Devils scouts have been watching French forward in action in Spain, according to reports.
The 19-year-old forward is reportedly being chased by a host of big clubs in Europe.
Borussia Dortmund confirmed Hummels's transfer request to join Bayern Munich ahead of the 2016/17 campaign.
Robert Lewandowski has been prolific for Bayern Munich this season scoring 38 goals in all competitions.
Atletico are chasing a third final in three years, Bayern their first since 2013.
Former players Ray Parlour and Charlie Nicholas demand an overhaul in north London.
The 27-year-old defender has been strongly linked with a move away from the German club.
Diego Simeone's side face daunting test against German champions at Vicente Calderon.
Mats Hummels has admitted that he will consider his position at Dortmund at the end of the current campaign.
The 27-year-old Dortmund captain has been strongly linked with a move to the Premier League.
The 23-year-old German has just over 12 months remaining on his contract at Bayern Munich.
Chelsea are confident that they can complete a deal for Moussa Dembele ahead of Tottenham.
Alexis Sanchez has over two years left on his Arsenal contract.
Manuel Pellegrini's side are unchartered waters in the last four of Europe's premier club competition.
Bayern Munich, Everton and Paris Saint-Germain are among clubs that have trained in Qatar
Barcelona failed to score a goal in the away leg as they crashed out of the tournament to Atletico.
Live coverage as four sides look to join Manchester City and Real Madrid in the semi-finals.
France Football claimed last month that Barcelona had an opening €35m bid turned down by Rennes.
Vidal won three Serie A titles under Conte at Juventus.