Ruben Amorim's Red Devils fell to defeat against Tottenham in their clash at the Estadio de San Mames - after Brennan Johnson's scrappy goal in the first-half.
Maddison was one of a number of injured Spurs stars ruled out of contention in Bilbao, but he was at the San Mames all the same to cheer his side onto victory from the stands.
Harry Maguire 's wife Fern has posted an update from Bilbao, where she has flown to support her husband ahead of Wednesday night's Europa League final at San Mames stadium.