Uefa are considering a request from Liverpool to move a Champions League match to avoid a clash with the 20th anniversary of the Hillsborough disaster.
Liverpool have asked if the second leg of their quarter-final - should they reach it - can be brought forward from its currently scheduled date of 15 April.
That day marks exactly two decades since 96 Liverpool fans lost their lives at Hillsborough before and during an FA Cup semi-final against Nottingham Forest.
Liverpool would like the game to be played on 14 April, allowing players and staff to attend a memorial service at Anfield the following day.
The club have alerted Uefa to this potential clash but European football's governing body will not make a firm decision until after the last-16 ties are played and the quarter-final draw made.
A Uefa spokesman said: "We have received a request and we will try our best to accommodate it, but we cannot guarantee at this stage that we will be able to."
Liverpool must first come through a two-legged tie against Real Madrid to reach the quarter-finals.