Last week's last-16 draw threw up a mouth-watering clash between the long-term north-west adversaries - the first time they will face one another in continental competition.
The first leg takes place at Anfield on March 10 at 8.05pm, but the return fixture on March 17 is slated for a 6pm start at Old Trafford.
It is understood the scheduled timing of the St Patrick's Day fixture has led Trafford Council's safety advisory board to contact European football's governing body requesting it is put back.
UEFA confirmed to Press Association Sport that it has received the council's letter on the matter and is currently evaluating its merits.
United are also reportedly in favour of moving the tie from the current 6pm start and Trafford Council is expected to make a statement on Wednesday afternoon.
Source : PA
Source: PA