The Sun says he made an extraordinary long-haul dash to get back in time for the Manchester derby.
Old Trafford boss Jose Mourinho was so desperate for his in-form right-back to feature the club even laid on a PRIVATE JET.
Valencia finished playing for Ecuador in Peru at 4am on Wednesday — but trained with United on Thursday morning.
He flew from Lima just hours after his country's 2-1 defeat to catch the first flight to Madrid.
United then had a private jet waiting on the runway in Spain to whisk him straight back to Manchester.